41 | Add to Reading ListSource URL: priceofoil.orgLanguage: English - Date: 2014-04-08 21:45:36
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42 | Add to Reading ListSource URL: priceofoil.orgLanguage: English - Date: 2014-04-08 21:38:52
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43 | Add to Reading ListSource URL: sci.odu.eduLanguage: English - Date: 2006-05-11 12:40:22
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44 | Add to Reading ListSource URL: iea-gia.orgLanguage: English - Date: 2013-10-16 21:34:36
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45 | Add to Reading ListSource URL: www.alexandrite.netLanguage: English |
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46 | Add to Reading ListSource URL: www.geosociety.orgLanguage: English - Date: 2009-10-06 12:58:43
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47 | Add to Reading ListSource URL: www.minemakers.com.auLanguage: English - Date: 2014-09-10 04:31:39
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48 | Add to Reading ListSource URL: www.alaskageology.orgLanguage: English - Date: 2013-05-17 13:20:54
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49 | Add to Reading ListSource URL: ieefa.orgLanguage: English - Date: 2015-05-22 12:58:53
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50 | Add to Reading ListSource URL: teachcoal.orgLanguage: English - Date: 2011-12-15 18:35:51
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