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1by Pepper, James F.“...U.S. Geological Survey bulletin ;...”
Published 1986
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2by Sirkin, Leslie A.“...U.S. Geological Survey bulletin ;...”
Published 1987
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3Published 1990“...U.S. Geological Survey bulletin ;...”
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4Published 1991“...U.S. Geological Survey bulletin ;...”
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5by Ratcliffe, Nicholas M. (Nicholas Morley), 1938-“...U.S. Geological Survey bulletin ;...”
Published 1992
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6Published 1995“...U.S. Geological Survey bulletin ;...”
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8by Ratcliffe, Nicholas M. (Nicholas Morley), 1938-“...U.S. Geological Survey bulletin ;...”
Published 1992
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11by Brown, C. Ervin (Clarence Ervin), 1925-“...U.S. Geological Survey bulletin ;...”
Published 1985
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14by Epstein, Jack Burton, 1935-“...U.S. Geological Survey bulletin ;...”
Published 1993
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15“...U.S. Geological Survey bulletin. Contributions to paleontology....”
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16by Williams, Henry Shaler, 1847-1918“...U.S. Geological survey. Bulletin ;...”
Published 1887
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17by Sirkin, Leslie A.“...U.S. Geological Survey bulletin ;...”
Published 1985
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