981 | Add to Reading ListSource URL: cdiac.ornl.govLanguage: English - Date: 2011-01-28 11:56:47
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982 | Add to Reading ListSource URL: digital.library.okstate.eduLanguage: English - Date: 2009-01-09 17:03:00
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983 | Add to Reading ListSource URL: www.epa.govLanguage: English - Date: 2012-01-31 16:02:47
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984 | Add to Reading ListSource URL: digital.library.okstate.eduLanguage: English - Date: 2009-01-09 16:58:07
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985 | Add to Reading ListSource URL: minerals.usgs.govLanguage: English - Date: 1999-10-05 10:47:22
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986 | Add to Reading ListSource URL: cdiac.ornl.govLanguage: English - Date: 2009-12-01 10:55:49
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987 | Add to Reading ListSource URL: digital.library.okstate.eduLanguage: English - Date: 2009-01-09 17:02:34
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988 | Add to Reading ListSource URL: www.adeq.state.ar.usLanguage: English - Date: 2014-03-04 13:46:10
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989 | Add to Reading ListSource URL: water.epa.govLanguage: English - Date: 2011-09-10 01:46:56
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990 | Add to Reading ListSource URL: www.sciencestuff.comLanguage: English - Date: 2013-06-10 11:06:08
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