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2Published 1981“...Geological Survey circular ;...”
Government Document Book -
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4by Shulters, M. V., 1950-“...Geological Survey circular ;...”
Published 1980
Government Document Book -
5by Jennings, Marshall E.“...Geological Survey circular ;...”
Published 1981
Government Document Book -
6by Hubbell, David Wellington, 1925-“...Geological Survey circular ;...”
Published 1983
Government Document Book -
7by Lombard, R. E.“...Geological Survey circular ;...”
Published 1981
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8Published 1984“...U.S. Geological Survey circular ;...”
Government Document Book -
9by Cummans, John“...Geological Survey circular ;...”
Published 1981
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10by Klein, John M.“...Geological Survey circular ;...”
Published 1984
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Government Document eBook -
11
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13by Fusté, Luis A.“...Geological Survey circular ;...”
Published 1981
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14
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15by Haeni, F. P.“...Geological Survey circular ;...”
Published 1983
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Government Document eBook -
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