451 | Add to Reading ListSource URL: pubs.usgs.govLanguage: English - Date: 2006-09-26 16:16:38
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452 | Add to Reading ListSource URL: pubs.usgs.govLanguage: English - Date: 2006-09-26 14:51:14
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453 | Add to Reading ListSource URL: www.puc.sd.govLanguage: English - Date: 2014-06-30 16:39:24
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454 | Add to Reading ListSource URL: pubs.usgs.govLanguage: English - Date: 1996-09-09 17:24:29
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455 | Add to Reading ListSource URL: pubs.usgs.govLanguage: English - Date: 2000-01-27 15:45:48
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456 | Add to Reading ListSource URL: pubs.usgs.govLanguage: English - Date: 2005-07-21 13:48:12
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457 | Add to Reading ListSource URL: pubs.usgs.govLanguage: English - Date: 2007-08-15 15:12:49
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458 | Add to Reading ListSource URL: pubs.usgs.govLanguage: English - Date: 2008-02-20 22:26:41
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459 | Add to Reading ListSource URL: www.mngs.umn.eduLanguage: English - Date: 2013-08-07 10:38:28
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460 | Add to Reading ListSource URL: pubs.usgs.govLanguage: English - Date: 1999-01-14 17:44:21
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