211 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2010-10-18 12:45:15
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212 | Add to Reading ListSource URL: www.usgs.govLanguage: English - Date: 2006-09-14 06:09:26
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213 | Add to Reading ListSource URL: www.usgs.govLanguage: English - Date: 2008-09-04 14:58:08
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214 | Add to Reading ListSource URL: www.dinoridge.orgLanguage: English - Date: 2012-10-23 18:08:21
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215 | Add to Reading ListSource URL: www.ksrevenue.orgLanguage: English - Date: 2012-10-18 16:23:01
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216 | Add to Reading ListSource URL: www.eia.govLanguage: English - Date: 2010-05-05 11:28:17
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217 | Add to Reading ListSource URL: www.eia.govLanguage: English - Date: 2010-06-14 10:19:56
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218 | Add to Reading ListSource URL: uttoncenter.unm.eduLanguage: English - Date: 2014-01-16 13:16:24
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219 | Add to Reading ListSource URL: www.usgs.govLanguage: English - Date: 2007-09-13 10:35:28
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220 | Add to Reading ListSource URL: www.usgs.govLanguage: English - Date: 2009-09-03 05:52:00
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