61 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 1997-06-26 12:16:12
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62 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2013-12-03 14:23:18
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63 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2000-02-15 10:39:40
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64 | Add to Reading ListSource URL: www.nwhc.usgs.govLanguage: English - Date: 2013-05-21 16:49:31
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65 | Add to Reading ListSource URL: igs.indiana.eduLanguage: English - Date: 2010-11-23 16:46:55
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66 | Add to Reading ListSource URL: www.cmnh.orgLanguage: English - Date: 2008-06-02 14:25:00
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