11 | Add to Reading ListSource URL: pubs.usgs.govLanguage: English - Date: 2014-08-28 10:58:00
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12 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2014-09-03 18:12:43
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13 | Add to Reading ListSource URL: www.epa.govLanguage: English - Date: 2012-06-06 16:01:07
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14 | Add to Reading ListSource URL: www.epa.govLanguage: English - Date: 2012-04-04 12:13:11
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15 | Add to Reading ListSource URL: hc-sc.gc.caLanguage: English - Date: 2013-07-09 12:16:44
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16 | Add to Reading ListSource URL: www.epa.govLanguage: English - Date: 2012-04-04 12:13:11
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17 | Add to Reading ListSource URL: minerals.er.usgs.govLanguage: English - Date: 1998-07-23 09:36:48
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18 | Add to Reading ListSource URL: www.epa.govLanguage: English - Date: 2012-06-06 17:02:51
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19 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2014-07-01 16:15:21
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20 | Add to Reading ListSource URL: www.epa.govLanguage: English - Date: 2012-04-04 12:13:11
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