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1Published 1985“...The Survey :...”
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2Published 1986“...The Survey :...”
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3Published 1986“...The Survey :...”
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4Published 1986“...The Survey :...”
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5Published 1986“...The Survey :...”
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6Published 1987“...The Survey ;...”
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7Published 1988“...The Survey ;...”
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8Published 1988“...The Survey ;...”
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9Published 1988“...The Survey ;...”
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10Published 1988“...The Survey ;...”
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11Published 1988“...The Survey ;...”
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12
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13
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14by Alvord, Donald C. (Donald Clayton), 1922-“...The Survey,...”
Published 1971
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15Published 1964“...The Survey,...”
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16Published 1964“...The Survey,...”
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17
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18by Schopp, Robert D.“...U.S. Geological Survey,...”
Published 2008
Report:
Abstract:
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19
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20“...U.S. Geological Survey,...”
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