11 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2013-01-29 12:09:37
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12 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2004-01-13 13:44:06
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13 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2002-02-14 13:28:21
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14 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2001-02-01 13:50:52
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15 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2004-03-30 10:15:44
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16 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2009-02-02 09:25:58
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17 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2000-03-06 14:03:41
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18 | Add to Reading ListSource URL: www.epa.govLanguage: English - Date: 2009-05-14 13:28:30
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19 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2003-02-11 14:31:26
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