11 | Add to Reading ListSource URL: www.epa.govLanguage: English - Date: 2012-04-04 12:13:02
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12 | Add to Reading ListSource URL: www.epa.govLanguage: English - Date: 2012-04-04 12:13:23
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13 | Add to Reading ListSource URL: www.epa.govLanguage: English - Date: 2012-04-04 12:13:02
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14 | Add to Reading ListSource URL: www.epa.govLanguage: English - Date: 2012-04-04 12:13:02
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15 | Add to Reading ListSource URL: www.epa.govLanguage: English - Date: 2012-04-04 12:13:23
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16 | Add to Reading ListSource URL: pubs.usgs.govLanguage: English - Date: 2010-08-11 12:54:36
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17 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 1999-10-05 10:45:21
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18 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 1999-10-05 12:00:50
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19 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2002-05-02 07:35:08
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20 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2011-01-24 14:50:08
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