871 | Add to Reading ListSource URL: pubs.usgs.govLanguage: English - Date: 2009-09-28 19:58:36
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872 | Add to Reading ListSource URL: pubs.usgs.govLanguage: English - Date: 2003-01-17 16:30:15
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873 | Add to Reading ListSource URL: digital.library.okstate.eduLanguage: English - Date: 2009-01-09 17:00:55
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874 | Add to Reading ListSource URL: www.geology.arkansas.govLanguage: English - Date: 2008-11-04 09:54:43
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875 | Add to Reading ListSource URL: geology.iweb.bsu.eduLanguage: English - Date: 2013-10-17 16:00:06
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876 | Add to Reading ListSource URL: www.dep.state.fl.usLanguage: English - Date: 2013-02-13 13:32:13
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877 | Add to Reading ListSource URL: www.dggs.alaska.govLanguage: English - Date: 2014-03-11 20:41:21
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878 | Add to Reading ListSource URL: www.usouthal.eduLanguage: English - Date: 2010-05-06 10:54:03
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879 | Add to Reading ListSource URL: wa.water.usgs.govLanguage: English - Date: 2014-04-07 17:41:10
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880 | Add to Reading ListSource URL: pubs.usgs.govLanguage: English - Date: 2009-09-28 19:36:40
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