31 | Add to Reading ListSource URL: www.narg.org.ukLanguage: English - Date: 2010-04-27 11:08:04
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32 | Add to Reading ListSource URL: www.energygraphics.comLanguage: English - Date: 2012-10-30 12:59:43
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33 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 1998-02-03 07:43:19
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34 | Add to Reading ListSource URL: www.cspg.orgLanguage: English - Date: 2013-01-02 23:15:10
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35 | Add to Reading ListSource URL: pubs.usgs.govLanguage: English - Date: 2001-07-24 11:02:36
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36 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2007-11-05 16:41:07
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37 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2006-12-13 16:31:18
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38 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2002-11-22 12:14:14
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39 | Add to Reading ListSource URL: pubs.usgs.govLanguage: English - Date: 2001-08-21 09:48:45
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40 | Add to Reading ListSource URL: pubs.usgs.govLanguage: English - Date: 2003-08-26 17:45:49
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