51 | Add to Reading ListSource URL: www.bfenvironmental.comLanguage: English - Date: 2010-09-06 13:31:30
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52 | Add to Reading ListSource URL: content.sierraclub.orgLanguage: English - Date: 2014-04-09 13:51:41
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53 | Add to Reading ListSource URL: www.agapito.comLanguage: English - Date: 2010-05-03 12:31:50
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54 | Add to Reading ListSource URL: www.oilshaleassoc.orgLanguage: English - Date: 2012-06-07 23:01:30
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55 | Add to Reading ListSource URL: www.icse.utah.eduLanguage: English - Date: 2011-06-03 15:28:04
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56 | Add to Reading ListSource URL: ostseis.anl.govLanguage: English - Date: 2008-09-04 19:25:19
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57 | Add to Reading ListSource URL: www.ceri-mines.orgLanguage: English - Date: 2011-05-23 18:53:29
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58 | Add to Reading ListSource URL: www.blm.govLanguage: English - Date: 2013-10-01 14:34:31
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