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1by Schaefer, Donald H.“...U.S. Dept. of the Interior, Geological Survey ; Open-File Services Section, U.S. Geological Survey,...”
Published 1983
Government Document Book -
2by Duffrin, Brian G.“...U.S. Dept. of the Interior, Geological Survey ; Open-File Services Section, U.S. Geological Survey,...”
Published 1985
Government Document Microform Book