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3Published 1972“...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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7
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8Published 1964“...U.S. Geological Survey,...”
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10by Schmidt, Robert George“...Dept. of the Interior, Geological Survey ;...”
Published 1978
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11by Schmidt, Robert George“...U.S. Dept. of the Interior, U.S. Geological Survey ;...”
Published 1986
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12by Bryant, Bruce, 1930-“...United States Department of the Interior, Geological Survey,...”
Published 1960
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13“...United States Department of the Interior, Geological Survey,...”
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14by Schmidt, Robert George“...United States Department of the Interior, Geological Survey,...”
Published 1978
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15by Schmidt, Robert George“...U.S. Department of the Interior, U.S. Geological Survey,...”
Published 1994
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16by Schmidt, Robert George“...United States Department of the Interior, Geological Survey,...”
Published 1985
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