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1by Nelson, Willis H. (Willis Howard), 1920-2010“...U.S. Geological Survey bulletin ;...”
Published 1990
Government Document Book -
2
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3by Powers, Howard A., Coats, Robert R. (Robert Roy), 1910-1995, Nelson, Willis H. (Willis Howard), 1920-2010“...Geological Survey bulletin ;...”
Published 1960
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Government Document eBook -
4by Lewis, Richard Quintin, 1919-, Nelson, Willis H. (Willis Howard), 1920-2010, Powers, Howard A.“...Geological Survey bulletin ;...”
Published 1960
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Government Document eBook -
5by Nelson, Willis H. (Willis Howard), 1920-2010“...Geological Survey bulletin ;...”
Published 1959
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Government Document eBook