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1by Ellsworth, C. E. (Clarence Eugene), 1882-“...United States Department of the Interior, Geological Survey,...”
Published 1939
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2by Ellsworth, C. E. (Clarence Eugene), 1882-“...Department of the Interior, United States Geological Survey,...”
Published 1923
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3by Grover, Nathan Clifford, 1868-1956, Ellsworth, C. E. (Clarence Eugene), 1882-, Gray, Glenn Arthur, 1884-“...Department of the Interior, United States Geological Survey,...”
Published 1922
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4“...Department of the Interior, United States Geological Survey,...”
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5“...Department of the Interior, United States Geological Survey,...”
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6“...Department of the Interior, United States Geological Survey,...”
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7“...United States Department of the Interior, Geological Survey,...”
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8“...United States Department of the Interior, Geological Survey,...”
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9“...United States Department of the Interior, Geological Survey,...”
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10“...United States Department of the Interior, Geological Survey,...”
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11“...United States Department of the Interior, Geological Survey,...”
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12by Parker, Glenn L. (Glenn Lane), 1884-, Ellsworth, C. E. (Clarence Eugene), 1882-, Follansbee, Robert, 1879-1952“...United States Department of the Interior, Geological Survey,...”
Published 1944
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13by Grover, Nathan Clifford, 1868-1956, Ellsworth, C. E. (Clarence Eugene), 1882-, Follansbee, Robert, 1879-1952“...United States Department of the Interior, Geological Survey,...”
Published 1930
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Government Document eBook