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1Published 1990“...The Survey :...”
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4Published 1972“...The Survey,...”
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5Published 1972“...The Survey,...”
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6Published 1972“...The Survey,...”
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7Published 1972“...The Survey,...”
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8
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9Published 1964“...U.S. Geological Survey,...”
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11by Schmidt, Robert George“...Dept. of the Interior, Geological Survey ;...”
Published 1978
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12by Schmidt, Robert George“...Dept. of the Interior, U.S. Geological Survey ;...”
Published 1985
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13by Schmidt, Robert George“...U.S. Dept. of the Interior, U.S. Geological Survey ;...”
Published 1986
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14by Bryant, Bruce, 1930-“...United States Department of the Interior, Geological Survey,...”
Published 1960
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15“...United States Department of the Interior, Geological Survey,...”
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16by Schmidt, Robert George“...United States Department of the Interior, Geological Survey,...”
Published 1978
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17“...United States Department of the Interior, Geological Survey,...”
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18by Schmidt, Robert George“...U.S. Department of the Interior, U.S. Geological Survey,...”
Published 1994
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19“...United States Department of the Interior, Geological Survey,...”
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20by Schmidt, Robert George“...United States Department of the Interior, Geological Survey,...”
Published 1985
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