[Reston, Va.] : U.S. Dept. of the Interior, U.S. Geological Survey ; Denver, CO : Information Services [distributor], 2008
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Map
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Full Title:
Precambrian basement structure map of the continental United States, an interpretation of geologic and aeromagnetic data by P.K. Sims, R.W. Saltus, and E.D. Anderson ; U.S. Department of the Interior, U.S. Geological Survey