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24. Camelsback Yale Public content 1906. 2011-12-12T21:21:15Z. 2022-03-29T20:38:44Z. Geological Survey (U.S.). U.S. Geological Survey. English. Public. Arizona.
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26. Carte géologique de l'Amérique du nord Yale Public content 1906. 2003-03-10T22:42:39Z. 2020-09-18T16:36:33Z. s.n. French. Public. North America.
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