61 | Add to Reading ListSource URL: pubs.usgs.govLanguage: English - Date: 2006-09-22 11:16:12
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62 | Add to Reading ListSource URL: pubs.usgs.govLanguage: English - Date: 2008-05-02 01:06:31
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63 | Add to Reading ListSource URL: pubs.usgs.govLanguage: English - Date: 2006-09-15 18:18:30
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64 | Add to Reading ListSource URL: pubs.usgs.govLanguage: English - Date: 2006-09-25 12:37:26
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65 | Add to Reading ListSource URL: pubs.usgs.govLanguage: English - Date: 2006-09-22 13:34:04
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66 | Add to Reading ListSource URL: pubs.usgs.govLanguage: English - Date: 2006-09-15 18:01:51
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67 | Add to Reading ListSource URL: pubs.usgs.govLanguage: English - Date: 2008-05-02 01:04:32
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68 | Add to Reading ListSource URL: pubs.usgs.govLanguage: English - Date: 2005-09-07 12:18:54
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69 | Add to Reading ListSource URL: pubs.usgs.govLanguage: English - Date: 2008-02-20 22:26:41
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70 | Add to Reading ListSource URL: pubs.usgs.govLanguage: English - Date: 2008-02-20 22:27:00
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