551 | Add to Reading ListSource URL: www.errc.orgLanguage: English - Date: 2010-11-10 08:30:59
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552 | Add to Reading ListSource URL: www.handbookofmineralogy.orgLanguage: English - Date: 2007-09-30 02:36:10
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553 | Add to Reading ListSource URL: www.handbookofmineralogy.orgLanguage: English - Date: 2007-09-30 02:47:32
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554 | Add to Reading ListSource URL: ocw.mit.eduLanguage: English - Date: 2013-09-29 11:14:41
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555 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2010-01-21 12:52:50
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556 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2010-01-27 09:49:01
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557 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2009-02-02 08:23:45
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558 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 1999-10-05 11:38:29
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559 | Add to Reading ListSource URL: rruff.infoLanguage: English - Date: 2007-04-18 18:22:58
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560 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2006-01-19 08:23:28
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