161 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2003-02-11 10:52:44
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162 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2004-01-13 09:56:46
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163 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2006-01-18 13:48:27
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164 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2007-01-17 13:36:53
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165 | Add to Reading ListSource URL: nopr.niscair.res.inLanguage: English - Date: 2009-06-09 12:30:18
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166 | Add to Reading ListSource URL: www.ti-cons.comLanguage: English - Date: 2013-10-17 03:56:07
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167 | Add to Reading ListSource URL: www.mdpi.orgLanguage: English - Date: 2006-01-30 15:51:48
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168 | Add to Reading ListSource URL: www.factsandcomparisons.comLanguage: English - Date: 2008-09-17 23:27:22
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169 | Add to Reading ListSource URL: www.chalcogen.infim.roLanguage: English - Date: 2011-03-20 05:18:21
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170 | Add to Reading ListSource URL: www.epa.govLanguage: English - Date: 2012-03-21 13:05:51
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