11 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2015-01-23 16:23:05
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12 | Add to Reading ListSource URL: rock.geosociety.orgLanguage: English - Date: 2010-04-21 16:02:52
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13 | Add to Reading ListSource URL: www.epa.govLanguage: English - Date: 2012-04-04 12:13:10
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14 | Add to Reading ListSource URL: www.epa.govLanguage: English - Date: 2012-04-04 12:13:10
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15 | Add to Reading ListSource URL: minerals.er.usgs.govLanguage: English - Date: 1998-02-20 07:02:13
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16 | Add to Reading ListSource URL: www.epa.govLanguage: English - Date: 2012-04-04 12:13:10
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17 | Add to Reading ListSource URL: pubs.usgs.govLanguage: English - Date: 2014-05-15 08:57:57
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18 | Add to Reading ListSource URL: www.inchem.orgLanguage: English - Date: 2008-04-02 09:35:32
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19 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2012-11-14 14:17:28
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20 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2013-09-04 12:19:55
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