11 | Add to Reading ListSource URL: archives.govLanguage: English - Date: 2013-07-31 07:14:40
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12 | Add to Reading ListSource URL: archives.govLanguage: English - Date: 2013-09-05 12:09:12
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13 | Add to Reading ListSource URL: archives.govLanguage: English - Date: 2013-09-23 15:01:37
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14 | Add to Reading ListSource URL: archives.govLanguage: English - Date: 2011-05-20 11:28:34
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15 | Add to Reading ListSource URL: archives.govLanguage: English - Date: 2011-02-14 09:03:57
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16 | Add to Reading ListSource URL: archives.govLanguage: English - Date: 2014-04-24 15:06:39
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17 | Add to Reading ListSource URL: archives.govLanguage: English - Date: 2014-04-24 15:06:39
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18 | Add to Reading ListSource URL: www.usgs.govLanguage: English - Date: 2004-05-17 13:50:14
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19 | Add to Reading ListSource URL: www.usgs.govLanguage: English - Date: 2004-05-13 16:25:58
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20 | Add to Reading ListSource URL: www.usgs.govLanguage: English - Date: 2004-05-17 13:50:14
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