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  1. 1

    Geology of the conterminous United States at 1:2,500,000 scale : a digital representation of the 1974 P.B. King and H.M. Beikman map Release 2. by Schruben, Paul G.

    Published: U.S. Geological Survey, 1998
    Description: 1 CD-ROM ; 4 3/4 in.
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    Government Document Software Map
  2. 2

    Geology, geochemistry, geophysics, mineral occurrences, and mineral resource assessment for the commonwealth of Puerto Rico by Puerto Rico. Department of Natural Resources, University of Puerto Rico (Mayagüez Campus), Geological Survey (U.S.)

    Published: U.S. Dept. of the Interior, U.S. Geological Survey, 2001
    Description: 1 computer optical disc ; 4 3/4 in.
    Software Book
  3. 3

    Geology of Nevada a digital representation of the 1978 Geologic map of Nevada by Turner, Robert M.

    Published: U.S. Geological Survey, 1991
    Description: 1 computer laser optical disk : color ; 4 3/4 in.
    Government Document Electronic Software Map