41 | Add to Reading ListSource URL: www.usgs.govLanguage: English - Date: 2009-10-23 18:22:57
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42 | Add to Reading ListSource URL: pubs.usgs.govLanguage: English - Date: 2014-12-03 18:18:29
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43 | Add to Reading ListSource URL: pubs.usgs.govLanguage: English - Date: 2014-11-24 11:24:06
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44 | Add to Reading ListSource URL: pubs.usgs.govLanguage: English - Date: 2014-08-13 18:30:07
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45 | Add to Reading ListSource URL: www.edc.uri.eduLanguage: English - Date: 2014-09-02 09:12:30
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46 | Add to Reading ListSource URL: www.dnr.ne.govLanguage: English - Date: 2014-09-19 07:48:47
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47 | Add to Reading ListSource URL: mappingmd.msa.maryland.govLanguage: English - Date: 2011-04-11 15:39:58
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48 | Add to Reading ListSource URL: www.env.gov.bc.caLanguage: English - Date: 2012-03-05 14:29:41
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49 | Add to Reading ListSource URL: gis.idaho.govLanguage: English - Date: 2011-05-26 11:09:59
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50 | Add to Reading ListSource URL: dnr.alaska.govLanguage: English - Date: 2012-01-11 15:15:52
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