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  1. Main Page (518 revisions)
  2. Appalachian Gas Plays (297 revisions)
  3. Chesapeake Energy (191 revisions)
  4. Range Resources (146 revisions)
  5. Smart toy (128 revisions)
  6. Stevanne Auerbach (Dr. Toy) (105 revisions)
  7. Hydro-fracturing (103 revisions)
  8. Chief Oil and Gas (82 revisions)
  9. Rex Energy Corporation (75 revisions)
  10. Marcellus shale (75 revisions)
  11. CONSOL Energy Inc (68 revisions)
  12. Norse Energy (63 revisions)
  13. EQT Corporation (62 revisions)
  14. Atlas Energy (61 revisions)
  15. Cabot Oil and Gas Corp (60 revisions)
  16. Epsilon Energy Ltd (60 revisions)
  17. Questerre Energy Corporation (54 revisions)
  18. Pennsylvania (54 revisions)
  19. Carrizo Oil and Gas (50 revisions)
  20. EOG Resources (49 revisions)
  21. Seneca Energy Production Company (46 revisions)
  22. EXCO Resources, Inc (45 revisions)
  23. Chemicals (44 revisions)
  24. East Resources (42 revisions)
  25. Pennsylvania Department of Environmental Protection (42 revisions)
  26. Horizontal drilling (41 revisions)
  27. Susquehanna River Basin Commission (39 revisions)
  28. MarkWest Liberty Midstream and Resources (38 revisions)
  29. Gastem (38 revisions)
  30. National sarcasm society (37 revisions)
  31. Southwestern Energy Company (36 revisions)
  32. Forest Oil Corporation (35 revisions)
  33. Ultra Petroleum Corp (34 revisions)
  34. New York (33 revisions)
  35. Fortuna Energy Inc. (31 revisions)
  36. Shale sweepstakes (31 revisions)
  37. Wayne County (31 revisions)
  38. Environmental concerns (30 revisions)
  39. Sarcasm (30 revisions)
  40. Penn Virginia Corporation (30 revisions)
  41. Seismic testing (29 revisions)
  42. Bradford (28 revisions)
  43. Trans Energy Inc (28 revisions)
  44. Utica shale (27 revisions)
  45. National Fuel (27 revisions)
  46. Flowback water (26 revisions)
  47. Seismic waves (25 revisions)
  48. Stone Energy Corp. (25 revisions)
  49. Mark West Energy (25 revisions)
  50. Delaware River Basin Commission (24 revisions)
  51. Dominion Transmission Inc (24 revisions)
  52. Antero Resources (24 revisions)
  53. Canadian Quantum Energy (23 revisions)
  54. Talisman Energy Inc (23 revisions)
  55. Magnum Hunter Resources Corp (22 revisions)
  56. Dawson Geophysical Co (22 revisions)
  57. EnCana Corp (22 revisions)
  58. Ethane (21 revisions)
  59. Dominion Gas (21 revisions)
  60. Covalent Energy (21 revisions)
  61. XTO Energy (21 revisions)
  62. Gentilly (20 revisions)
  63. Huron shale (20 revisions)
  64. Penneco Oil Company (20 revisions)
  65. Williams Transco (20 revisions)
  66. SM Energy Company (19 revisions)
  67. Halliburton (19 revisions)
  68. New York Department of Environmental Conservation (19 revisions)
  69. Petrolia (19 revisions)
  70. Pennsylvania General Energy Corp (18 revisions)
  71. Forest Fragmentation In Natural Gas Drilling (18 revisions)
  72. West Bay Exploration (17 revisions)
  73. Altai Resources Inc (17 revisions)
  74. Patterson-UTI Energy (17 revisions)
  75. Gastar Exploration Ltd (17 revisions)
  76. Junex Inc (17 revisions)
  77. Marcellus Shale Coalition (17 revisions)
  78. The Williams Companies, Inc (17 revisions)
  79. Petoskey Exploration LLC (16 revisions)
  80. Baker Hughes Oilfield Operations Inc (16 revisions)
  81. Notes on Josh Fox rebuttal of EID (16 revisions)
  82. Drilling and stray natural gas migration (16 revisions)
  83. Mooncor Oil & Gas Corp (16 revisions)
  84. Energy Corporation of America (15 revisions)
  85. Alta Resources LLC (15 revisions)
  86. Keystone Midstream Services, LLC (15 revisions)
  87. West Virginia (15 revisions)
  88. Quest Resource Corporation (15 revisions)
  89. Slickwater (15 revisions)
  90. Proppant (14 revisions)
  91. Exxon Mobil Corp (14 revisions)
  92. Unbridled Energy Corp (14 revisions)
  93. Research issues (14 revisions)
  94. Newfield Exploration Co (13 revisions)
  95. Anadarko Exploration & Production Company (13 revisions)
  96. Statoil-Hydro (13 revisions)
  97. Texas Eastern Appalachia to Market (13 revisions)
  98. Trenton-Black River (13 revisions)
  99. Washington (13 revisions)
  100. Anschutz Exploration (13 revisions)
  101. Arbor Resources of Michigan (13 revisions)
  102. Spectra Energy (13 revisions)
  103. West Virginia Department of Environmental Protection (13 revisions)
  104. Schlumberger (13 revisions)
  105. PDC Energy (12 revisions)
  106. Tenaska Resources, LLC (12 revisions)
  107. Tioga (12 revisions)
  108. Saint Lawrence Lowlands (12 revisions)
  109. Tennessee Gas Pipeline (12 revisions)
  110. Pioneer Drilling Co (12 revisions)
  111. Samson Investment Company (12 revisions)
  112. Empire Energy USA LLC (12 revisions)
  113. Independent Oil and Gas Association of New York (12 revisions)
  114. Fracturing fluid (12 revisions)
  115. Continental Resources (12 revisions)
  116. Cochin pipeline (11 revisions)
  117. Ohio (11 revisions)
  118. PDC Mountaineer, LLC (11 revisions)
  119. Pennsylvania Oil & Gas Association (11 revisions)
  120. AB Resources LLC (11 revisions)
  121. Triana Energy (11 revisions)
  122. Pinnacle Technologies (11 revisions)
  123. Hess Corp (11 revisions)
  124. Corridor Resources Inc (11 revisions)
  125. Marcellus lateral project (11 revisions)
  126. Waste water (11 revisions)
  127. Rice Energy LLC (11 revisions)
  128. Canbriam Energy (11 revisions)
  129. Pipeline (11 revisions)
  130. Stone Energy Corporation (11 revisions)
  131. Petrolympic (11 revisions)
  132. Appalachia Shale Water Conservation and Management Committee (11 revisions)
  133. Inergy LP (10 revisions)
  134. Chenango (10 revisions)
  135. BJ Services (10 revisions)
  136. Inflection Energy LLC (10 revisions)
  137. Alamo Energy Corp (10 revisions)
  138. Drilling practices (10 revisions)
  139. Energy and Minerals Group (10 revisions)
  140. Guardian Exploration LLC (10 revisions)
  141. Clearfield (10 revisions)
  142. Laurel Mountain Midstream LLC (10 revisions)
  143. Cryogenic processing plant (10 revisions)
  144. Turm Oil (10 revisions)
  145. EV Energy Partners (9 revisions)
  146. Penn State Cooperative Extension - Natural Gas Impacts (9 revisions)
  147. Phillips Resources, Inc (9 revisions)
  148. Superior Well Services, Inc. (9 revisions)
  149. Dominion Exploration and Production Inc (9 revisions)
  150. Eureka Resources LLC (9 revisions)
  151. Huntley & Huntley, Inc (9 revisions)
  152. Tyche Energy Inc. (9 revisions)
  153. Evans Geophysical (9 revisions)
  154. Columbia Gas Transmission (9 revisions)
  155. Dale Property Services Penn, LLC (9 revisions)
  156. Horizontal air drilling (9 revisions)
  157. Josh Fox (9 revisions)
  158. Test (9 revisions)
  159. Microseismic evaluation (9 revisions)
  160. DrillN Man (9 revisions)
  161. Gastar Exploration Ltd. (9 revisions)
  162. Gopher-it Workshop (9 revisions)
  163. Natural gas liquids (9 revisions)
  164. Carnegie Mellon Univ. - Ctr. for Water Quality in Urban Environmental Systems (WaterQUEST) (9 revisions)
  165. Universal Well Services (9 revisions)
  166. Farnham & Associates, Inc (8 revisions)
  167. Haldimand petroleum project (8 revisions)
  168. Appalachian Gateway Project (8 revisions)
  169. WhitMar Exploration Co (8 revisions)
  170. Herkimer formation (8 revisions)
  171. Snyder Brothers Inc (8 revisions)
  172. Ohio Division of Mineral Resources Management (8 revisions)
  173. Noise-control (8 revisions)
  174. Pad drilling (8 revisions)
  175. Marc I Hub Line (8 revisions)
  176. David Hill Inc (8 revisions)
  177. Kinder Morgan Energy Partners (8 revisions)
  178. Caiman Energy LLC (8 revisions)
  179. Enerplus (8 revisions)
  180. 300 Line (7 revisions)
  181. GE Water & Process Technologies (7 revisions)
  182. Heliportable equipment (7 revisions)
  183. Knox Dolomite (7 revisions)
  184. Learning curve economies (7 revisions)
  185. West Virginia Oil and Natural Gas Association (7 revisions)
  186. Greencastle Resources (7 revisions)
  187. AOP Clearwater (7 revisions)
  188. Marathon Oil Corporation (7 revisions)
  189. Delaware Riverkeeper Network (7 revisions)
  190. Damascus Citizens for Sustainability (7 revisions)
  191. Drilling locations (7 revisions)
  192. Forbes Energy Services (7 revisions)
  193. Natural Gas (7 revisions)
  194. New York Shale Gas (7 revisions)
  195. Non-trivial Trivia (7 revisions)
  196. Energy Services of America (7 revisions)
  197. Devon Energy (7 revisions)
  198. Unit Corp (7 revisions)
  199. Nanotechnology (7 revisions)
  200. PennEnvironment (7 revisions)
  201. Weatherford International (7 revisions)
  202. Equitrans Pipeline (7 revisions)
  203. PC Exploration (7 revisions)
  204. PennFuture (7 revisions)
  205. Produced water (7 revisions)
  206. Allegheny Ozone (7 revisions)
  207. Biography (7 revisions)
  208. Keeton Group LLC (7 revisions)
  209. Knapp Acquisitions & Production, LLC (7 revisions)
  210. Madison (7 revisions)
  211. Navigant Consulting (6 revisions)
  212. Pennsylvania College of Technology (6 revisions)
  213. Pennsylvania Independent Oil and Gas Association (6 revisions)
  214. Welltec (6 revisions)
  215. NiSource (6 revisions)
  216. Pennsylvania Council of Professional Geologists (6 revisions)
  217. GFI Oil & Gas (6 revisions)
  218. Barnett shale land farms (6 revisions)
  219. Seismic data (6 revisions)
  220. Pennsylvania Department of Conservation and Natural Resources (6 revisions)
  221. BLX Inc (6 revisions)
  222. Millennium Pipeline (6 revisions)
  223. Drilling fluids (6 revisions)
  224. Penn State Dickinson School of Law - Agricultural Law Resource and Reference Center (6 revisions)
  225. Citrus Energy (6 revisions)
  226. Empire Connector (6 revisions)
  227. Gas industry legal fieldwork (6 revisions)
  228. Keystone Pipeline (6 revisions)
  229. Little Pine Resources (6 revisions)
  230. Bronco Drilling (6 revisions)
  231. Trout Unlimited (6 revisions)
  232. Williams Partners LP (6 revisions)
  233. Admiral Bay Resources, Inc (6 revisions)
  234. Big Sandy Pipeline (6 revisions)
  235. Lorraine shale (6 revisions)
  236. Test3 (6 revisions)
  237. Tudor, Pickering, Holt & Co. (6 revisions)
  238. Drilling Appalachian Corp (6 revisions)
  239. Closed loop system (6 revisions)
  240. Dissolved hydrocarbons (6 revisions)
  241. National Association of Royalty Owners (5 revisions)
  242. Endeavour International Corp (5 revisions)
  243. Lufkin Industries Inc (5 revisions)
  244. Cornell Cooperative Extension (5 revisions)
  245. Michigan Department of Natural Resources and Environment (5 revisions)
  246. Centre (5 revisions)
  247. Unbridled Energy Corp. (5 revisions)
  248. Mountain V (5 revisions)
  249. National Oilwell Varco (5 revisions)
  250. Ohio Oil and Gas Association (5 revisions)
  251. Fit-for-purpose rig (5 revisions)
  252. Aqua-Pure Ventures (5 revisions)
  253. Royal Dutch Shell (5 revisions)
  254. Belden & Blake Corporation (5 revisions)
  255. South Jersey Industries (5 revisions)
  256. TerrAqua Resource Management (5 revisions)
  257. MDS Energy (5 revisions)
  258. Complete Production Services Inc. (5 revisions)
  259. Delphi Midstream Partners, LLC (5 revisions)
  260. Union Drilling Inc (5 revisions)
  261. Miller Energy Inc (5 revisions)
  262. ECCO Energy Corp. (5 revisions)
  263. Penn State Marcellus Center for Outreach and Research (MCOR) (5 revisions)
  264. Global Geophysical Services (5 revisions)
  265. BreitBurn Energy Partners LP (5 revisions)
  266. Lackawanna College - Gas Technology Program (5 revisions)
  267. Champlain Resources Inc. (5 revisions)
  268. Compressor station (5 revisions)
  269. UGI Corporation (5 revisions)
  270. Drilling log (5 revisions)
  271. Westmont Resources Inc (5 revisions)
  272. Ziegenfuss Drilling (5 revisions)
  273. System 8000 (5 revisions)
  274. MegaEnergy Inc (5 revisions)
  275. Zone Oil & Gas (5 revisions)
  276. Farm-in (5 revisions)
  277. K&L Gates (5 revisions)
  278. Capital City Energy Group, Inc. (5 revisions)
  279. Stryker Energy (5 revisions)
  280. Chautauqua County (5 revisions)
  281. Victory Energy Corporation (5 revisions)
  282. ESG Solutions (5 revisions)
  283. El Paso Corporation (5 revisions)
  284. GASFRAC Energy Services Inc (5 revisions)
  285. Independent Oil and Gas Association of West Virginia (5 revisions)
  286. Superior Appalachian Pipeline LLC (5 revisions)
  287. Object Reservoir, Inc (4 revisions)
  288. PostRock (4 revisions)
  289. Adventure Energy, Inc (4 revisions)
  290. Allied Technology (4 revisions)
  291. J. Howard Bass & Associates (4 revisions)
  292. CGGVeritas (4 revisions)
  293. Contractor Services of West Virginia (4 revisions)
  294. Elexco Land Services Inc. (4 revisions)
  295. Flotek Industries, Inc (4 revisions)
  296. Aiello Bros. Oil and Gas Inc (4 revisions)
  297. JFK Oil Terminal (4 revisions)
  298. Lenape Resources, Inc (4 revisions)
  299. Texas Keystone (4 revisions)
  300. Marcellus Shale in Pennsylvania - Gas Well Locations (4 revisions)
  301. Valerus Compression Service (4 revisions)
  302. Elk (4 revisions)
  303. Environmental Noise Control (4 revisions)
  304. GasSearch Drilling Services Corporation (4 revisions)
  305. Public Lands at Environmental Working Group (4 revisions)
  306. LLAMA Horizontal Drilling Technologies, Inc (4 revisions)
  307. Wildlife Specialists LLC (4 revisions)
  308. Everest Exploration Co, LLC (4 revisions)
  309. Hanley and Bird, Inc (4 revisions)
  310. Champlain Resources Inc (4 revisions)
  311. Trican Well Service Ltd (4 revisions)
  312. U.S. Energy Development Corp (4 revisions)
  313. Frac Tech Services (4 revisions)
  314. Running Foxes Petroleum (4 revisions)
  315. Canbriam Energy of Calgary (4 revisions)
  316. Clarion (4 revisions)
  317. MDS Energy, LTD (4 revisions)
  318. The Jeff Dunan Page (4 revisions)
  319. MineralPlace.com (4 revisions)
  320. Facts of the Day (4 revisions)
  321. Allegheny Defense Project (4 revisions)
  322. Armstrong (4 revisions)
  323. Stream-Flo Industries Ltd (4 revisions)
  324. Charles Ryan Associates (4 revisions)
  325. Conquest Seismic Services (4 revisions)
  326. NOVUS Exploration, LLC (4 revisions)
  327. Platts Oilgram News (4 revisions)
  328. Rigzone (4 revisions)
  329. Independent Oil and Gas Association of Pennsylvania (4 revisions)
  330. J.A.G. Mines Ltd. (4 revisions)
  331. Laser Marcellus Gathering Co (4 revisions)
  332. Westmoreland County Community College - Shalenet (4 revisions)
  333. North Carolina shale (4 revisions)
  334. Pennsylvania Geological Survey (4 revisions)
  335. RAM Energy Resources (4 revisions)
  336. Hotwell Services Inc. (4 revisions)
  337. Wet gas region (3 revisions)
  338. Riverkeeper Inc. (3 revisions)
  339. Hunt Oil USA Inc. (3 revisions)
  340. Barnett shale (3 revisions)
  341. Thermogenic gas (3 revisions)
  342. Mason Dixon Energy Inc (3 revisions)
  343. Waco Oil & Gas (3 revisions)
  344. Northeast Natural Energy (3 revisions)
  345. Wood Mackenzie (3 revisions)
  346. Potter (3 revisions)
  347. Alpha Natural Resources (3 revisions)
  348. Appalachian Geophysical Services (3 revisions)
  349. SUNY Fredonia Shale Research Institute (3 revisions)
  350. Kriebel Resources Co (3 revisions)
  351. D & I Silica (3 revisions)
  352. Wescorp Energy (3 revisions)
  353. Noble Energy Inc (3 revisions)
  354. Pennsylvania Public Utility Commission (3 revisions)
  355. Flowback (3 revisions)
  356. Rage of Nature (3 revisions)
  357. Susquehanna (3 revisions)
  358. M3 Midstream LLC (3 revisions)
  359. Types of pipelines (3 revisions)
  360. GlobaLogix (3 revisions)
  361. Greene County, PA (3 revisions)
  362. Honor Resources Co (3 revisions)
  363. Total dissolved solids (3 revisions)
  364. NGInnovations Inc (3 revisions)
  365. West Virginia Surface Owners Rights Organization (3 revisions)
  366. Wilkes University Center for Environmental Quality (3 revisions)
  367. Oil And Gas Accountability Project (3 revisions)
  368. Pagaslease.com - Natural Gas Leasing Forum For Landowners (3 revisions)
  369. Allegheny (3 revisions)
  370. RigData (3 revisions)
  371. Skelly and Loy (3 revisions)
  372. Total organic carbon (3 revisions)
  373. Tristone Capital (3 revisions)
  374. Microbial gas (3 revisions)
  375. Velocity Energy Inc (3 revisions)
  376. William J. McIntire Coal, Oil and Gas Co (3 revisions)
  377. Express Energy Services (3 revisions)
  378. Pittsburgh Geological Society (3 revisions)
  379. Fractracker (3 revisions)
  380. Altima Resources Ltd (3 revisions)
  381. Rural Impact (3 revisions)
  382. Big Sandy Field (3 revisions)
  383. SkyTruth: Upper Green River Valley - A View From Above (3 revisions)
  384. Clean Water (3 revisions)
  385. Modern Drilling Operations: Hydraulic Fracturing (3 revisions)
  386. Expro (3 revisions)
  387. Prochemtech (3 revisions)
  388. Haynesville shale (3 revisions)
  389. Ashton Energy Group (3 revisions)
  390. Hotwell Services Inc (3 revisions)
  391. Kinetex (3 revisions)
  392. Crosslinked guar gel (3 revisions)
  393. Mid-East Gas Inc./M.M. & V Energy LLC (3 revisions)
  394. Flex rig (3 revisions)
  395. Atlas Copco (3 revisions)
  396. Rural Impacts (3 revisions)
  397. Cambria (3 revisions)
  398. Stallion Oilfield Services Ltd (3 revisions)
  399. Tetra Tech Inc (3 revisions)
  400. Vista Resources (3 revisions)
  401. West Virginia Natural Gas Association (2 revisions)
  402. Enterprise Products Partners LP (2 revisions)
  403. Exxon-XTO Merger Strikes A Blow for Energy Independence Both Here and Abroad (2 revisions)
  404. RETTEW (2 revisions)
  405. Ressources et Énergie Squatex Inc (2 revisions)
  406. Blue Flame Energy Corp (2 revisions)
  407. Shale Gas and Americas Future (2 revisions)
  408. Cambridge Energy Research Associates (2 revisions)
  409. Targa Resources Inc (2 revisions)
  410. Marcellus Shale Formation (2 revisions)
  411. Twin Tiers (2 revisions)
  412. Mike Hogan (2 revisions)
  413. Drilling economics (2 revisions)
  414. WYOMING! (2 revisions)
  415. Endless Mountain Energy LLC (2 revisions)
  416. Pike County, KY (2 revisions)
  417. Geokinetics (2 revisions)
  418. RJK Explorations (2 revisions)
  419. Ressources naturelles et Faune Québec (2 revisions)
  420. Blue Sky Oilfield Services (2 revisions)
  421. Catskill Mountainkeeper (2 revisions)
  422. Surfactant (2 revisions)
  423. Luzerne (2 revisions)
  424. Columbia County, PA (2 revisions)
  425. McJunkin Red Man Corp (2 revisions)
  426. Morgantown Energy Technology Center (DOE) (2 revisions)
  427. Duncan Land & Energy (2 revisions)
  428. Northeast Upgrade Project (2 revisions)
  429. PUMPCO Energy Services, Inc (2 revisions)
  430. First American Spatial Solutions (2 revisions)
  431. Geophysical log (2 revisions)
  432. Appalachian Producer Services (2 revisions)
  433. Basic Energy Services (2 revisions)
  434. Boyd Petrosearch (2 revisions)
  435. Shawn Valentino (2 revisions)
  436. Keystone Energy Forum (2 revisions)
  437. Les Mines J.A.G (2 revisions)
  438. Total E&P USA, Inc (2 revisions)
  439. Dunn’s Tank Service (2 revisions)
  440. New York City Department of Environmental Protection (2 revisions)
  441. Energy In Depth (2 revisions)
  442. Northern Oil and Gas, Inc (2 revisions)
  443. X-Terra Resources Corp (2 revisions)
  444. FMC Fluid Controls (2 revisions)
  445. Acid fracturing (2 revisions)
  446. Gas Technology Institute (2 revisions)
  447. Quebec (2 revisions)
  448. Rain for Rent (2 revisions)
  449. Baker Gas (2 revisions)
  450. Lackawanna (2 revisions)
  451. The Gopher System (2 revisions)
  452. Medina (2 revisions)
  453. MicroSeismic, Inc (2 revisions)
  454. Vavco (2 revisions)
  455. Eclipse Resources (2 revisions)
  456. Energy In Depth - Northeast Marcellus Initiative (2 revisions)
  457. Epic Energy Resources (2 revisions)
  458. Facebook Marcellus Shale Group (2 revisions)
  459. Pennsylvania Fish and Boat Commission (2 revisions)
  460. Flare (2 revisions)
  461. Adirondack dome (2 revisions)
  462. Pritchard Capital Partners (2 revisions)
  463. Quebec Oil and Gas Association (2 revisions)
  464. Greenes Energy Group (2 revisions)
  465. Hart Resources Technology (2 revisions)
  466. In the Red Zone (2 revisions)
  467. Bentek Energy (2 revisions)
  468. J-W Operating (2 revisions)
  469. Sylvan Energy (2 revisions)
  470. MarcellusFacts.com (2 revisions)
  471. Covington Gathering System (2 revisions)
  472. Denex (2 revisions)
  473. Ecosphere Technologies (2 revisions)
  474. Flaring a well (2 revisions)
  475. Forest (2 revisions)
  476. Haynesville Play (2 revisions)
  477. Savoy Energy LP (2 revisions)
  478. Shale Environmental Technology Review (2 revisions)
  479. J.A.G. Mines Ltd (2 revisions)
  480. Lodge Energy (2 revisions)
  481. The Marcellus Effect (2 revisions)
  482. Marcellus Quarterly (2 revisions)
  483. TransAmerican Energy Inc (2 revisions)
  484. Vertical drilling (2 revisions)
  485. Educators (2 revisions)
  486. New York State Energy Research and Development Authority (2 revisions)
  487. Empire Pipeline (2 revisions)
  488. O.I.L. Niagaran LLC (2 revisions)
  489. PA Shale Gas Blog (2 revisions)
  490. Allegheny National Forest (2 revisions)
  491. American Clean Skies Foundation (2 revisions)
  492. Broome County (2 revisions)
  493. MSC Newsroom (2 revisions)
  494. Mesa Energy Holdings, Inc (2 revisions)
  495. Diminishing returns (2 revisions)
  496. Univ. of Pittsburgh at Bradford- The Energy Institute (2 revisions)
  497. Molopo Australia (2 revisions)
  498. Drilling safely issues (2 revisions)
  499. West Virginia Highlands Conservancy (2 revisions)
  500. New York State Gas & Electric (2 revisions)

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