511 | Add to Reading ListSource URL: pubs.usgs.govLanguage: English - Date: 2005-06-10 19:41:19
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512 | Add to Reading ListSource URL: water.usgs.govLanguage: English - Date: 2011-06-15 12:21:24
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513 | Add to Reading ListSource URL: pubs.usgs.govLanguage: English - Date: 2005-06-10 19:37:38
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514 | Add to Reading ListSource URL: www.sdgs.usd.eduLanguage: English - Date: 2014-02-28 11:07:21
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515 | Add to Reading ListSource URL: pubs.usgs.govLanguage: English - Date: 2005-06-10 19:11:48
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516 | Add to Reading ListSource URL: pubs.usgs.govLanguage: English - Date: 2004-06-30 10:26:45
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517 | Add to Reading ListSource URL: prairie.illinois.eduLanguage: English - Date: 2013-08-15 15:34:20
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518 | Add to Reading ListSource URL: pubs.usgs.gov- Date: 2005-06-13 16:47:29
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519 | Add to Reading ListSource URL: pubs.usgs.govLanguage: English - Date: 2012-04-18 21:25:34
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520 | Add to Reading ListSource URL: pubs.usgs.govLanguage: English - Date: 2004-06-30 09:43:03
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