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1Subjects: “...Geology Iowa....”
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5by Anderson, Wayne I., 1935-Subjects: “...Geology Iowa....”
Published 1998
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6Published 1986Subjects: “...Geology Iowa Maps....”
Government Document Map -
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8Published 1992Subjects: “...Geology Iowa Maps....”
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13Subjects: “...Geology Iowa....”
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16Subjects: “...Geology Iowa....”
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18by Davidson, D. T. (Donald Thomas), 1919-Subjects: “...Geology Iowa Bibliography....”
Published 1951
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