311 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2007-11-08 15:25:25
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312 | Add to Reading ListSource URL: www.nationalslag.orgLanguage: English - Date: 2013-04-26 15:42:14
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313 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2011-03-14 14:50:34
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314 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2012-08-15 13:56:29
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315 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2011-10-12 13:19:58
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316 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2013-01-16 13:58:18
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317 | Add to Reading ListSource URL: water.epa.govLanguage: English - Date: 2011-09-10 15:21:39
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318 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2013-05-31 10:27:55
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319 | Add to Reading ListSource URL: www.accessdata.fda.govLanguage: English - Date: 2013-03-08 13:44:18
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320 | Add to Reading ListSource URL: www.wsscwater.comLanguage: English - Date: 2010-04-07 12:58:50
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