41 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2013-01-29 14:24:00
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42 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2012-10-03 09:55:41
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43 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2013-12-12 08:34:00
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44 | Add to Reading ListSource URL: pubs.usgs.govLanguage: English - Date: 2007-11-05 13:09:17
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45 | Add to Reading ListSource URL: pubs.usgs.govLanguage: English - Date: 2005-08-23 15:12:31
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46 | Add to Reading ListSource URL: mom.gov.afLanguage: English - Date: 2011-10-25 03:43:25
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47 | Add to Reading ListSource URL: geopubs.wr.usgs.govLanguage: English - Date: 2002-03-21 12:11:15
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48 | Add to Reading ListSource URL: www.metalbulletin.comLanguage: English |
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49 | Add to Reading ListSource URL: www.iwaweb.orgLanguage: English - Date: 2011-09-23 06:07:28
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50 | Add to Reading ListSource URL: www.nerc.ac.ukLanguage: English - Date: 2006-11-27 05:21:20
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