41 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2003-01-09 11:00:28
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42 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2006-08-15 08:58:53
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43 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2004-09-14 10:35:11
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44 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2001-02-26 08:07:08
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45 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2002-05-08 10:08:48
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46 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 1999-05-13 13:35:36
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47 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2000-01-31 09:55:40
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48 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2000-10-23 07:10:42
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49 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2000-04-11 11:41:12
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50 | Add to Reading ListSource URL: www.epa.govLanguage: English - Date: 2005-11-01 15:25:56
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