41 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2002-05-07 07:45:18
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42 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2000-10-23 07:10:27
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43 | Add to Reading ListSource URL: www.gpo.govLanguage: English - Date: 2014-03-06 05:56:09
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44 | Add to Reading ListSource URL: www.peckhamandmckenney.comLanguage: English - Date: 2013-11-26 17:34:55
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45 | Add to Reading ListSource URL: www.matthewskoller.comLanguage: English - Date: 2014-02-20 12:41:01
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46 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2007-08-31 11:17:22
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47 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2000-10-26 06:50:23
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48 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2006-08-15 09:15:57
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49 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2004-09-14 13:56:13
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50 | Add to Reading ListSource URL: www.catholic-pe.co.zaLanguage: English - Date: 2012-02-16 08:22:39
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