311 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2004-09-14 11:01:38
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312 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2007-08-31 11:00:57
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313 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 1997-09-16 10:20:51
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314 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2000-02-04 07:24:38
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315 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2006-08-15 08:59:26
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316 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 1996-12-17 14:53:04
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317 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2000-10-02 06:18:20
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318 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2000-10-31 06:59:53
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319 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 1996-08-02 13:11:10
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320 | Add to Reading ListSource URL: www.epa.govLanguage: English - Date: 2005-11-01 15:25:58
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