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1by Matson, George Charlton, 1873-“...Department of the Interior, United States Geological Survey,...”
Published 1916
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2by Fenneman, Nevin Melancthon, 1865-1945“...Department of the Interior, United States Geological Survey,...”
Published 1906
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3by Wells, J. V. B.“...United States Department of the Interior, Geological Survey,...”
Published 1959
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Government Document eBook