41 | Add to Reading ListSource URL: ngmdb.usgs.govLanguage: English - Date: 2014-01-18 09:40:04
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42 | Add to Reading ListSource URL: www.dcnr.state.pa.usLanguage: English - Date: 2014-08-27 16:23:30
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43 | Add to Reading ListSource URL: www.srbc.netLanguage: English - Date: 2014-02-24 09:50:43
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44 | Add to Reading ListSource URL: www.ipa.udel.eduLanguage: English - Date: 2009-01-12 10:16:36
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45 | Add to Reading ListSource URL: www.srbc.netLanguage: English - Date: 2013-07-07 16:28:34
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46 | Add to Reading ListSource URL: www.isgs.illinois.eduLanguage: English - Date: 2013-07-08 15:52:52
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47 | Add to Reading ListSource URL: www.fish.state.pa.usLanguage: English - Date: 2007-04-13 09:31:06
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48 | Add to Reading ListSource URL: pubs.usgs.govLanguage: English - Date: 2012-11-05 11:41:02
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49 | Add to Reading ListSource URL: www.ipa.udel.eduLanguage: English - Date: 2005-04-13 09:17:54
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50 | Add to Reading ListSource URL: ag.udel.eduLanguage: English - Date: 2009-03-19 16:10:15
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