61 | Add to Reading ListSource URL: www.uky.eduLanguage: English - Date: 2000-04-20 10:26:38
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62 | Add to Reading ListSource URL: digital.library.okstate.eduLanguage: English - Date: 2005-11-08 11:46:03
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63 | Add to Reading ListSource URL: www.mndigital.orgLanguage: English - Date: 2012-07-05 16:09:04
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64 | Add to Reading ListSource URL: pubs.usgs.govLanguage: English - Date: 2012-11-05 11:28:32
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65 | Add to Reading ListSource URL: www.wvgs.wvnet.eduLanguage: English - Date: 2014-07-30 15:12:11
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66 | Add to Reading ListSource URL: www.nbmg.unr.eduLanguage: English - Date: 2005-10-24 12:27:28
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67 | Add to Reading ListSource URL: www.consrv.ca.govLanguage: English - Date: 2012-05-12 02:26:08
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68 | Add to Reading ListSource URL: va.water.usgs.govLanguage: English - Date: 2008-10-07 09:20:26
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69 | Add to Reading ListSource URL: www.usgs.govLanguage: English - Date: 2012-04-12 22:48:06
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70 | Add to Reading ListSource URL: www.nbmg.unr.eduLanguage: English - Date: 2003-10-01 12:17:18
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