571 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2011-06-13 11:42:33
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572 | Add to Reading ListSource URL: www.nr.gov.nl.caLanguage: English - Date: 2010-11-17 09:10:07
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573 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2013-06-19 13:32:56
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574 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2009-05-14 15:38:56
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575 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2000-01-31 10:10:58
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576 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2012-08-03 08:06:26
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577 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2013-06-18 09:49:10
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578 | Add to Reading ListSource URL: www.epa.govLanguage: English - Date: 2012-04-04 12:13:41
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579 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2010-07-19 12:05:04
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580 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2011-06-30 14:49:36
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