11 | Add to Reading ListSource URL: pubs.usgs.govLanguage: English - Date: 2004-02-09 12:44:24
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12 | Add to Reading ListSource URL: www.nature.nps.govLanguage: English - Date: 2006-06-08 12:47:56
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13 | Add to Reading ListSource URL: www.nature.nps.govLanguage: English - Date: 2006-06-08 12:48:49
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14 | Add to Reading ListSource URL: www1.eere.energy.govLanguage: English - Date: 2007-08-01 10:46:11
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15 | Add to Reading ListSource URL: www1.eere.energy.govLanguage: English - Date: 2007-08-01 10:52:55
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16 | Add to Reading ListSource URL: www.nps.govLanguage: English - Date: 2013-05-04 18:33:31
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17 | Add to Reading ListSource URL: www.nps.govLanguage: English - Date: 2013-03-18 15:33:43
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18 | Add to Reading ListSource URL: geodesy.noaa.govLanguage: English - Date: 2009-11-03 13:58:35
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19 | Add to Reading ListSource URL: www.ngs.noaa.govLanguage: English - Date: 2009-11-03 13:58:35
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20 | Add to Reading ListSource URL: www.westcarb.orgLanguage: English - Date: 2011-04-26 14:54:46
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