641 | Add to Reading ListSource URL: phys.orgLanguage: English - Date: 2014-11-19 19:07:07
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642 | Add to Reading ListSource URL: minerals.er.usgs.govLanguage: English - Date: 2002-10-09 08:07:56
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643 | Add to Reading ListSource URL: minerals.er.usgs.govLanguage: English - Date: 2002-04-30 08:29:30
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644 | Add to Reading ListSource URL: minerals.er.usgs.govLanguage: English - Date: 2000-02-01 12:24:55
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645 | Add to Reading ListSource URL: minerals.er.usgs.govLanguage: English - Date: 1997-11-13 07:51:05
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646 | Add to Reading ListSource URL: minerals.er.usgs.govLanguage: English - Date: 2000-11-16 07:32:13
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647 | Add to Reading ListSource URL: minerals.er.usgs.govLanguage: English - Date: 2001-03-19 06:48:58
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648 | Add to Reading ListSource URL: minerals.er.usgs.govLanguage: English - Date: 1997-11-13 07:52:51
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649 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2007-08-31 11:13:30
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650 | Add to Reading ListSource URL: minerals.er.usgs.govLanguage: English - Date: 2007-08-31 11:13:30
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