11 | Add to Reading ListSource URL: www.nps.govLanguage: English - Date: 2013-07-31 16:33:26
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12 | Add to Reading ListSource URL: aces.nmsu.eduLanguage: English - Date: 2005-03-31 18:53:34
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14 | Add to Reading ListSource URL: digital.library.okstate.eduLanguage: English - Date: 2009-01-09 17:06:34
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15 | Add to Reading ListSource URL: digital.library.okstate.eduLanguage: English - Date: 2009-01-09 17:07:32
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16 | Add to Reading ListSource URL: www.nps.govLanguage: English - Date: 2014-04-08 14:51:02
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17 | Add to Reading ListSource URL: www.nps.govLanguage: English - Date: 2014-04-08 14:51:02
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18 | Add to Reading ListSource URL: palaeontologia-electronica.earthsci.carleton.caLanguage: English - Date: 2011-11-24 15:13:06
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19 | Add to Reading ListSource URL: www.fws.govLanguage: English - Date: 2011-08-09 12:18:08
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20 | Add to Reading ListSource URL: digitallibrary.amnh.orgLanguage: English - Date: 2011-06-22 16:54:00
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