71 | Add to Reading ListSource URL: pubs.usgs.govLanguage: English - Date: 2010-09-19 10:33:58
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72 | Add to Reading ListSource URL: pubs.usgs.govLanguage: English - Date: 2011-11-15 15:03:03
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73 | Add to Reading ListSource URL: pubs.usgs.govLanguage: English - Date: 2011-11-16 12:10:58
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74 | Add to Reading ListSource URL: rock.geosociety.orgLanguage: English - Date: 2011-11-23 11:41:45
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75 | Add to Reading ListSource URL: pubs.usgs.govLanguage: English - Date: 2010-12-15 15:19:16
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76 | Add to Reading ListSource URL: geoconvention.orgLanguage: English - Date: 2014-06-08 22:35:03
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77 | Add to Reading ListSource URL: geoconvention.orgLanguage: English - Date: 2014-06-08 22:34:21
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78 | Add to Reading ListSource URL: geoconvention.orgLanguage: English - Date: 2014-06-08 22:29:12
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79 | Add to Reading ListSource URL: www.fws.govLanguage: English - Date: 2010-08-30 09:32:58
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80 | Add to Reading ListSource URL: geoconvention.orgLanguage: English - Date: 2014-06-08 22:31:05
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