41 | Add to Reading ListSource URL: pubs.usgs.govLanguage: English - Date: 2001-05-22 03:00:00
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42 | Add to Reading ListSource URL: pubs.usgs.govLanguage: English - Date: 2001-05-22 03:00:00
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43 | Add to Reading ListSource URL: pubs.usgs.govLanguage: English - Date: 2001-05-22 03:00:00
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44 | Add to Reading ListSource URL: pubs.usgs.govLanguage: English - Date: 2001-05-22 03:00:00
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45 | Add to Reading ListSource URL: pubs.usgs.govLanguage: English - Date: 2001-05-22 03:00:00
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46 | Add to Reading ListSource URL: pubs.usgs.govLanguage: English - Date: 2001-05-22 03:00:00
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47 | Add to Reading ListSource URL: pubs.usgs.govLanguage: English - Date: 2001-05-22 03:00:00
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48 | Add to Reading ListSource URL: pubs.usgs.govLanguage: English - Date: 2001-05-22 03:00:00
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49 | Add to Reading ListSource URL: digital.library.okstate.eduLanguage: English - Date: 2009-01-09 16:55:14
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50 | Add to Reading ListSource URL: www.oipc.ab.ca- Date: 2013-12-12 16:47:13
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