31 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 1996-08-22 14:16:40
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32 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2008-03-27 08:06:05
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33 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2002-04-30 12:08:26
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34 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2006-08-15 09:13:37
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35 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2000-10-26 06:48:17
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36 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2012-08-15 14:45:40
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37 | Add to Reading ListSource URL: www.elkem.comLanguage: English - Date: 2012-12-06 02:36:44
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38 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2008-05-21 11:02:00
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39 | Add to Reading ListSource URL: hugin.infoLanguage: English - Date: 2009-04-28 08:42:28
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40 | Add to Reading ListSource URL: hugin.infoLanguage: English - Date: 2007-10-31 01:43:19
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