71 | Add to Reading ListSource URL: minerals.er.usgs.govLanguage: English - Date: 1997-03-19 11:46:16
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72 | Add to Reading ListSource URL: www.epa.govLanguage: English - Date: 2012-04-04 12:13:08
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73 | Add to Reading ListSource URL: www.epa.govLanguage: English - Date: 2012-04-04 12:13:09
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74 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2004-10-08 08:52:34
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75 | Add to Reading ListSource URL: www.aditfunds.comLanguage: English - Date: 2011-09-08 16:58:40
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76 | Add to Reading ListSource URL: trade.ec.europa.euLanguage: English - Date: 2012-10-31 06:18:10
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77 | Add to Reading ListSource URL: www.rotaperiod.comLanguage: English - Date: 2007-06-25 11:45:04
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78 | Add to Reading ListSource URL: www-pdg.lbl.gov- Date: 2009-05-26 16:48:41
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79 | Add to Reading ListSource URL: www-pdg.lbl.govLanguage: English - Date: 2010-08-19 14:07:46
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80 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2013-01-29 11:55:51
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