41 | Add to Reading ListSource URL: www.epa.govLanguage: English - Date: 2012-03-21 13:06:50
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42 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2014-09-02 16:06:28
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43 | Add to Reading ListSource URL: www.epa.govLanguage: English - Date: 2012-04-04 12:13:03
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44 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 1999-10-05 12:03:51
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45 | Add to Reading ListSource URL: www.epa.govLanguage: English - Date: 2009-10-21 11:25:40
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46 | Add to Reading ListSource URL: www.atsdr.cdc.govLanguage: English - Date: 2012-12-06 09:51:34
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47 | Add to Reading ListSource URL: ec.europa.euLanguage: English - Date: 2008-12-04 08:57:07
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48 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2013-06-24 13:36:57
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49 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2013-12-23 13:50:01
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50 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2011-01-19 13:36:09
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