41 | Add to Reading ListSource URL: www.epa.govLanguage: English - Date: 2012-04-04 12:13:12
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42 | Add to Reading ListSource URL: www.epa.govLanguage: English - Date: 2014-01-10 12:41:37
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43 | Add to Reading ListSource URL: minerals.er.usgs.govLanguage: English - Date: 1997-03-06 10:14:53
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44 | Add to Reading ListSource URL: www.maine.govLanguage: English - Date: 2013-07-26 10:00:01
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45 | Add to Reading ListSource URL: www.maine.govLanguage: English - Date: 2013-07-26 10:00:00
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46 | Add to Reading ListSource URL: www.epa.govLanguage: English - Date: 2012-04-04 12:13:12
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47 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 1999-10-05 11:28:55
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48 | Add to Reading ListSource URL: pubs.usgs.govLanguage: English - Date: 2010-02-23 06:56:48
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49 | Add to Reading ListSource URL: www.fcx.comLanguage: English - Date: 2014-06-03 15:34:33
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50 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2003-01-28 16:07:40
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