591 | Add to Reading ListSource URL: webgis.wr.usgs.govLanguage: English - Date: 2001-05-21 17:52:58
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592 | Add to Reading ListSource URL: www.crwr.utexas.eduLanguage: English - Date: 2005-12-13 16:00:24
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593 | Add to Reading ListSource URL: www.oregongeology.orgLanguage: English - Date: 2006-01-19 18:07:32
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594 | Add to Reading ListSource URL: pubs.usgs.govLanguage: English - Date: 2006-10-10 14:12:04
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595 | Add to Reading ListSource URL: pubs.usgs.govLanguage: English - Date: 2006-09-29 17:05:58
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596 | Add to Reading ListSource URL: pubs.usgs.govLanguage: English - Date: 2006-10-09 17:55:44
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597 | Add to Reading ListSource URL: www.gao.govLanguage: English - Date: 2011-09-29 08:45:53
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598 | Add to Reading ListSource URL: pubs.usgs.govLanguage: English - Date: 2006-09-29 17:55:10
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599 | Add to Reading ListSource URL: nsidc.orgLanguage: English - Date: 2011-11-29 12:32:43
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600 | Add to Reading ListSource URL: pubs.usgs.govLanguage: English - Date: 2006-10-09 14:45:32
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