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1Published 1985“...U.S. Geological Survey bulletin ;...”
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2Published 1988“...U.S. Geological Survey bulletin ;...”
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3Published 1987“...U.S. Geological Survey bulletin ;...”
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4Published 1989“...U.S. Geological Survey bulletin ;...”
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5Published 1990“...U.S. Geological Survey bulletin ;...”
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6Published 1990“...U.S. Geological Survey bulletin ;...”
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7Published 1991“...U.S. Geological Survey bulletin ;...”
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8Published 1991“...U.S. Geological Survey bulletin ;...”
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9Published 1993“...U.S. Geological Survey bulletin....”
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10Published 1994“...U.S. Geological Survey bulletin....”
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11by Sando, William Jasper“...U.S. Geological Survey bulletin ;...”
Published 1995
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