661 | Add to Reading ListSource URL: www.epa.govLanguage: English - Date: 2005-11-01 11:53:59
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662 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2012-08-15 11:25:52
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663 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2013-05-29 10:26:21
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664 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2014-08-14 13:44:16
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665 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2013-08-09 17:23:37
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666 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2013-03-08 15:02:43
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667 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2013-12-19 11:45:41
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668 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2013-09-19 12:40:03
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669 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2013-09-30 13:18:10
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670 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2014-03-28 07:45:40
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