51 | Add to Reading ListSource URL: www.vet.utk.eduLanguage: English - Date: 2003-07-11 11:08:35
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52 | Add to Reading ListSource URL: water.usgs.govLanguage: English - Date: 1999-04-28 15:57:14
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53 | Add to Reading ListSource URL: acwi.govLanguage: English - Date: 2008-09-17 17:01:57
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54 | Add to Reading ListSource URL: uw.physics.wisc.eduLanguage: English - Date: 2013-08-14 15:33:23
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55 | Add to Reading ListSource URL: pubs.usgs.govLanguage: English - Date: 2009-01-28 16:05:06
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56 | Add to Reading ListSource URL: www.epa.govLanguage: English - Date: 2012-12-20 15:08:57
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57 | Add to Reading ListSource URL: www.env.gov.bc.caLanguage: English - Date: 2013-01-15 12:47:18
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58 | Add to Reading ListSource URL: www.azdeq.govLanguage: English - Date: 2003-11-12 18:04:00
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59 | Add to Reading ListSource URL: www.epa.govLanguage: English - Date: 2007-07-17 16:00:23
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60 | Add to Reading ListSource URL: oh.water.usgs.govLanguage: English - Date: 2008-02-19 09:25:18
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