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1
Contributions to economic geology, 1903. S. F. Emmons, C.W. Hayes, Geologists in Charge. [U.S. Geological Survey Bulletin No. 225. Series A, Economic Geology, 33.]
Published 1904Subjects: Online Access
Government Document Electronic eBook -
2
Mineral Resources of the United States, calendar year 1906.
Published 1907Subjects: Online Access
Government Document Electronic eBook