[Reston, Va.?] : U.S. Dept. of the Interior, U.S. Geological Survey, 2008
Format:
Map
Edition:
Version 1.0.
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Full Title:
Base of principal aquifer for the Elkhorn-Loup model area, North-Central Nebraska / by V.L. McGuire and S.M. Peterson ; U.S. Department of the Interior, U.S. Geological Survey ; in cooperation with Lewis and Clark NRD [and others].