591 | Add to Reading ListSource URL: www.nasa.govLanguage: English - Date: 2013-04-30 20:24:11
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592 | Add to Reading ListSource URL: digital.library.okstate.eduLanguage: English - Date: 2009-01-09 17:04:43
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593 | Add to Reading ListSource URL: www.physics.utoronto.caLanguage: English - Date: 2000-08-02 10:01:52
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594 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2004-01-13 08:55:56
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595 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2000-08-30 13:19:51
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596 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 1999-08-23 14:15:29
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597 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 1999-05-13 09:54:30
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598 | Add to Reading ListSource URL: www.epa.govLanguage: English - Date: 2012-04-04 11:50:21
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599 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2014-03-07 14:00:09
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600 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 2010-01-26 15:11:14
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