641 | Add to Reading ListSource URL: onlinepubs.trb.orgLanguage: English - Date: 2006-11-01 09:17:17
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642 | Add to Reading ListSource URL: ngmdb.usgs.govLanguage: English - Date: 2007-01-30 09:03:45
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643 | Add to Reading ListSource URL: www.ius.eduLanguage: English - Date: 2014-05-13 16:58:00
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644 | Add to Reading ListSource URL: www.uen.orgLanguage: English - Date: 2012-07-06 14:56:37
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645 | Add to Reading ListSource URL: www.dahp.wa.govLanguage: English - Date: 2011-07-31 16:31:20
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646 | Add to Reading ListSource URL: www.fgdc.govLanguage: English - Date: 2009-07-23 16:43:33
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647 | Add to Reading ListSource URL: ngmdb.usgs.govLanguage: English - Date: 2007-01-30 09:03:20
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648 | Add to Reading ListSource URL: www.puc.texas.govLanguage: English - Date: 2014-01-29 11:10:23
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649 | Add to Reading ListSource URL: ngmdb.usgs.govLanguage: English - Date: 2009-09-11 09:03:42
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650 | Add to Reading ListSource URL: ngmdb.usgs.govLanguage: English - Date: 2008-05-26 08:50:20
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