41 | Add to Reading ListSource URL: library.fandm.eduLanguage: English - Date: 2014-07-03 09:47:48
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42 | Add to Reading ListSource URL: www.columbia.eduLanguage: English - Date: 2004-02-27 10:46:49
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43 | Add to Reading ListSource URL: www.sirweb.orgLanguage: English - Date: 2008-05-22 12:37:47
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44 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2006-08-15 09:00:13
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45 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2006-08-15 08:58:13
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46 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2007-07-03 09:45:02
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47 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2007-08-31 10:54:02
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48 | Add to Reading ListSource URL: www.publictransit.usLanguage: English - Date: 2007-01-16 01:07:25
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49 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2000-10-03 13:23:52
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50 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2002-05-07 07:11:24
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