551 | Add to Reading ListSource URL: pubs.usgs.govLanguage: English - Date: 2004-07-01 12:20:48
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552 | Add to Reading ListSource URL: pubs.usgs.govLanguage: English - Date: 2005-06-10 19:24:20
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553 | Add to Reading ListSource URL: pubs.usgs.govLanguage: English - Date: 2010-04-27 10:05:59
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554 | Add to Reading ListSource URL: pubs.usgs.govLanguage: English - Date: 2010-07-30 11:47:00
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555 | Add to Reading ListSource URL: pubs.usgs.govLanguage: English - Date: 2005-06-13 16:43:58
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556 | Add to Reading ListSource URL: www.geology.ar.govLanguage: English - Date: 2008-11-04 09:54:43
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557 | Add to Reading ListSource URL: pubs.usgs.govLanguage: English - Date: 2010-11-15 09:55:12
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558 | Add to Reading ListSource URL: pubs.usgs.govLanguage: English - Date: 2010-11-26 06:28:12
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559 | Add to Reading ListSource URL: www.inrs.illinois.eduLanguage: English - Date: 2013-08-15 15:34:20
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560 | Add to Reading ListSource URL: www.dnr.wa.govLanguage: English - Date: 2014-10-10 15:37:17
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