11 | Add to Reading ListSource URL: ngmdb.usgs.govLanguage: English - Date: 2014-01-18 09:40:06
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12 | Add to Reading ListSource URL: www.energy.gov.ab.caLanguage: English - Date: 2014-08-06 17:58:05
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13 | Add to Reading ListSource URL: snr.unl.eduLanguage: English - Date: 2011-05-09 15:25:52
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14 | Add to Reading ListSource URL: www.isgs.illinois.eduLanguage: English - Date: 2013-05-20 15:56:36
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15 | Add to Reading ListSource URL: www.geoconvention.comLanguage: English - Date: 2014-04-01 11:55:21
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16 | Add to Reading ListSource URL: ngmdb.usgs.govLanguage: English - Date: 2014-01-18 09:40:06
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17 | Add to Reading ListSource URL: www.geoconvention.comLanguage: English - Date: 2014-04-01 11:29:05
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18 | Add to Reading ListSource URL: www.eub.gov.ab.caLanguage: English - Date: 2014-07-28 16:01:41
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19 | Add to Reading ListSource URL: www.isgs.illinois.eduLanguage: English - Date: 2013-07-08 15:52:52
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20 | Add to Reading ListSource URL: www.aer.caLanguage: English - Date: 2014-07-28 16:01:41
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