1 | Add to Reading ListSource URL: www.econ.brown.eduLanguage: English - Date: 2006-07-26 11:20:47
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2 | Add to Reading ListSource URL: www.gpo.govLanguage: English - Date: 2013-06-04 16:32:50
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3 | Add to Reading ListSource URL: publications.iowa.govLanguage: English - Date: 2012-11-12 10:59:18
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4 | Add to Reading ListSource URL: www.pdiowa.comLanguage: English - Date: 2014-07-28 13:26:59
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5 | Add to Reading ListSource URL: www.iowadot.govLanguage: English - Date: 2009-06-15 11:20:50
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6 | Add to Reading ListSource URL: www.damtodam.comLanguage: English - Date: 2014-02-23 19:26:24
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7 | Add to Reading ListSource URL: www.damtodam.comLanguage: English - Date: 2014-02-23 19:26:18
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8 | Add to Reading ListSource URL: pubs.usgs.govLanguage: English - Date: 2012-01-18 12:50:19
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9 | Add to Reading ListSource URL: www.iowadot.govLanguage: English - Date: 2009-06-30 17:09:35
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