31 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2001-04-30 07:16:29
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32 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2002-05-07 11:03:30
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33 | Add to Reading ListSource URL: www.brownfieldstsc.orgLanguage: English - Date: 2005-07-25 16:07:29
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34 | Add to Reading ListSource URL: www.hcnv.usLanguage: English - Date: 2013-12-20 15:17:02
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35 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2013-10-18 08:45:53
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36 | Add to Reading ListSource URL: www.handbookofmineralogy.orgLanguage: English - Date: 2007-09-30 00:45:26
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37 | Add to Reading ListSource URL: www.handbookofmineralogy.comLanguage: English - Date: 2007-09-30 00:45:26
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38 | Add to Reading ListSource URL: www.infomine.comLanguage: English - Date: 2009-03-25 21:38:51
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39 | Add to Reading ListSource URL: www.handbookofmineralogy.comLanguage: English - Date: 2007-09-30 02:56:44
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