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1by Ekren, E. B. (Einar Bartlett), 1923-, Byers, F. M. (Frank M.), 1916-, Hardyman, Richard F., Marvin, Richard F., Silberman, Miles L.“...Geological Survey bulletin ;...”
Published 1980
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2Published 1987“...U.S. Geological Survey bulletin ;...”
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3by Hardyman, Richard F.“...U.S. Geological Survey bulletin ;...”
Published 1987
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