11 | Add to Reading ListSource URL: cnas.tamu.edu- Date: 2012-09-11 15:29:29
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12 | Add to Reading ListSource URL: econgeol.mines.edu- Date: 2012-01-28 18:13:30
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13 | Add to Reading ListSource URL: rmgsc.cr.usgs.gov- Date: 2015-11-03 09:33:28
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14 | Add to Reading ListSource URL: msudenver.edu- Date: 2016-07-26 11:22:21
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15 | Add to Reading ListSource URL: datanuggets.org- Date: 2016-03-23 10:27:04
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16 | Add to Reading ListSource URL: www2.mmm.ucar.eduLanguage: English - Date: 2011-07-19 10:48:38
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17 | Add to Reading ListSource URL: www.danielsfund.orgLanguage: English - Date: 2015-07-06 16:23:54
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18 | Add to Reading ListSource URL: www.eiasm.orgLanguage: English - Date: 2016-04-15 05:23:13
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19 | Add to Reading ListSource URL: greatlakescenter.orgLanguage: English - Date: 2016-07-25 15:11:37
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20 | Add to Reading ListSource URL: msudenver.eduLanguage: English - Date: 2016-07-26 11:22:20
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