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Conservation-Grazing Lands P.16

by U.S. Soil Conservation Service
Published 1948

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OF THE UNGLACIATED ALLEGHENY PLATEAU, UPPER OHIO VALLEY, AS INTERPRETED FROM A PIPELINE EXCAVATION1

by Lessig Heber D, Heber D. Lessig, U. S. Soil, Conservation Service
Published 1964

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OF THE UNGLACIATED ALLEGHENY PLATEAU, UPPER OHIO VALLEY, AS INTERPRETED FROM A PIPELINE EXCAVATION1

by Lessig Heber D, Heber D. Lessig, U. S. Soil, Conservation Service
Published 1964

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