311 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2003-01-02 14:21:50
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312 | Add to Reading ListSource URL: nhd.usgs.govLanguage: English - Date: 2005-05-12 16:11:35
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313 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2007-07-09 15:15:37
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314 | Add to Reading ListSource URL: www.usgs.govLanguage: English - Date: 2008-09-04 14:58:08
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315 | Add to Reading ListSource URL: www.ipa.udel.eduLanguage: English - Date: 2009-06-05 08:02:10
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316 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2005-06-16 14:34:11
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317 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2013-04-05 15:07:01
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318 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2009-03-25 11:34:27
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319 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2005-06-16 08:48:07
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320 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2010-04-12 11:32:32
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