51 | Add to Reading ListSource URL: www.lic.wisc.eduLanguage: English - Date: 2010-04-29 12:07:04
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52 | Add to Reading ListSource URL: www.clu-in.orgLanguage: English - Date: 2012-09-04 14:47:23
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53 | Add to Reading ListSource URL: ardf.wr.usgs.govLanguage: English - Date: 2012-07-25 12:39:20
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54 | Add to Reading ListSource URL: ardf.wr.usgs.govLanguage: English - Date: 2012-07-25 12:40:02
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55 | Add to Reading ListSource URL: www.lakesuperiorstreams.orgLanguage: English - Date: 2010-08-23 16:56:36
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56 | Add to Reading ListSource URL: www.lpi.usra.eduLanguage: English - Date: 2012-05-08 15:43:57
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57 | Add to Reading ListSource URL: www.ndep.nv.govLanguage: English - Date: 2010-12-03 16:04:29
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58 | Add to Reading ListSource URL: tx.usgs.govLanguage: English - Date: 2011-12-19 14:52:44
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59 | Add to Reading ListSource URL: pubs.usgs.govLanguage: English - Date: 2002-05-28 13:51:00
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60 | Add to Reading ListSource URL: ardf.wr.usgs.govLanguage: English - Date: 2012-07-25 12:38:53
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