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Government Document Serial -
3Published 1982“...U.S. Geological Survey circular....”
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Government Document Serial -
5Published 1983“...Geological Survey circular....”
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9Published 1978“...Geological Survey circular ;...”
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11Published 1983“...Geological Survey circular ;...”
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16Published 1989“...U.S. Geological Survey circular....”
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17Published 1989“...U.S. Geological Survey circular....”
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