31 | Add to Reading ListSource URL: pubs.usgs.govLanguage: English - Date: 2006-10-04 10:33:25
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32 | Add to Reading ListSource URL: pubs.usgs.govLanguage: English - Date: 2006-10-04 11:00:57
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33 | Add to Reading ListSource URL: pubs.usgs.govLanguage: English - Date: 2006-10-04 11:09:50
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34 | Add to Reading ListSource URL: www.geopursuit.comLanguage: English - Date: 2012-12-11 17:08:01
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35 | Add to Reading ListSource URL: www.geopursuit.comLanguage: English - Date: 2013-09-09 13:56:13
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36 | Add to Reading ListSource URL: www.geopursuit.comLanguage: English - Date: 2011-11-10 12:33:35
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37 | Add to Reading ListSource URL: www.geopursuit.com- Date: 2011-11-10 13:32:16
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38 | Add to Reading ListSource URL: www.geopursuit.comLanguage: English - Date: 2013-03-26 12:56:31
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39 | Add to Reading ListSource URL: www.geopursuit.comLanguage: English - Date: 2013-01-16 12:34:59
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40 | Add to Reading ListSource URL: www.geopursuit.comLanguage: English - Date: 2012-07-18 17:15:05
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