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4by O'Sullivan, Robert Brett, 1923-“...Geological Survey professional paper ;...”
Published 1972
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5“...Geological Survey professional paper ;...”
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6Geology of the Paleozoic rocks, Navajo and Hopi Indian Reservations, Arizona, New Mexico, and Utah /by Irwin, James H. (James Haskell), 1923-, Stevens, Peter R. (Peter Ryan), 1924-, Cooley, M. E. (Maurice E.)“...Geological Survey professional paper ;...”
Published 1971
Government Document Book -
7Published 1972“...Geological Survey professional paper ;...”
Government Document Book