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1by Marshall, R. B. (Robert Bradford), 1867-1949“...Department of the Interior, United States Geological Survey,...”
Published 1915
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2by Paulsen, Carl G.“...United States Department of the Interior, Geological Survey,...”
Published 1949
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3by Paulsen, Carl G.“...United States Department of the Interior, Geological Survey,...”
Published 1948
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4Published 1969“...United States Department of the Interior, Geological Survey,...”
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5Published 1969“...United States Department of the Interior, Geological Survey,...”
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6“...United States Department of the Interior, Geological Survey,...”
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7“...United States Department of the Interior, Geological Survey,...”
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8by Grover, Nathan Clifford, 1868-1956“...United States Department of the Interior, Geological Survey,...”
Published 1930
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9by Grover, Nathan Clifford, 1868-1956“...United States Department of the Interior, Geological Survey,...”
Published 1930
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10by Grover, Nathan Clifford, 1868-1956“...United States Department of the Interior, Geological Survey,...”
Published 1931
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11by Grover, Nathan Clifford, 1868-1956“...United States Department of the Interior, Geological Survey,...”
Published 1930
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12by Grover, Nathan Clifford, 1868-1956“...United States Department of the Interior, Geological Survey,...”
Published 1931
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13by Grover, Nathan Clifford, 1868-1956“...United States Department of the Interior, Geological Survey,...”
Published 1931
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14by Grover, Nathan Clifford, 1868-1956“...United States Department of the Interior, Geological Survey,...”
Published 1932
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15by Grover, Nathan Clifford, 1868-1956“...United States Department of the Interior, Geological Survey,...”
Published 1932
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16by Grover, Nathan Clifford, 1868-1956“...United States Department of the Interior, Geological Survey,...”
Published 1932
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17by Grover, Nathan Clifford, 1868-1956“...United States Department of the Interior, Geological Survey,...”
Published 1932
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18by Grover, Nathan Clifford, 1868-1956“...United States Department of the Interior, Geological Survey,...”
Published 1932
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19by Grover, Nathan Clifford, 1868-1956“...United States Department of the Interior, Geological Survey,...”
Published 1932
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20by Meinzer, Oscar Edward, 1876-1948“...United States Department of the Interior, Geological Survey,...”
Published 1942
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