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The Driftless Area of the Upper Mississippi. By T. C. Chamberlin and R. D. Salisbury. (A monograph accompanying the Sixth Annual Report of the Director of the United States Geological Survey.) Washington, Government. 4°

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Science  23 Dec 1887:
Vol. ns-10, Issue 255, pp. 306-307
DOI: 10.1126/science.ns-10.255.306-a

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