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1by Moxham, Robert Morgan, 1919-“...Geological Survey circular ;...”
Published 1954
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2
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3by Applin, Paul L. (Paul Livingston)“...Geological Survey circular ;...”
Published 1951
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4by McPherson, Benjamin F.“...U.S. Geological Survey circular ;...”
Published 1996
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5
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6by Schiffer, Donna M.“...U.S. Geological Survey circular ;...”
Published 1998
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7Published 1998“...U.S. Geological Survey circular ;...”
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10by Verdi, Richard Jay“...U.S. Geological Survey circular ;...”
Published 2006
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11
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13by Berndt, Marian P.“...U.S. Geological Survey circular ;...”
Published 1998
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14
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15by Schiffer, Donna M.“...U.S. Geological Survey circular ;...”
Published 1998
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16by Frick, Elizabeth A.“...U.S. Geological Survey circular ;...”
Published 1998
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