371 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2006-01-19 08:29:23
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372 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2001-02-01 13:41:24
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373 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2012-09-17 08:25:51
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374 | Add to Reading ListSource URL: www.nma.orgLanguage: English - Date: 2013-03-20 14:51:10
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375 | Add to Reading ListSource URL: pubs.usgs.govLanguage: English - Date: 2011-09-27 12:25:06
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376 | Add to Reading ListSource URL: www.fas.orgLanguage: English - Date: 2014-05-06 14:01:20
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377 | Add to Reading ListSource URL: www.acs.orgLanguage: English - Date: 2013-05-08 12:45:17
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378 | Add to Reading ListSource URL: www.acs.orgLanguage: English - Date: 2013-05-08 12:45:40
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379 | Add to Reading ListSource URL: www.ggg.glLanguage: English - Date: 2011-10-14 00:15:53
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380 | Add to Reading ListSource URL: www.wto.orgLanguage: English - Date: 2014-08-08 04:00:58
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