Catalog

See all 23 catalog results
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  1. An evaluation of several geophysical methods for characterizing sand and gravel deposits

    Ellefsen, Karl
    Denver, CO : U.S. Department of the Interior, U.S. Geological Survey, 1998.

    Online purl.fdlp.gov

  2. An evaluation of several geophysical methods for characterizing sand and gravel deposits

    Ellefsen, Karl
    [Reston, Va.] : U.S. Department of the Interior, U.S. Geological Survey, 1998.

  3. An evaluation of several geophysical methods for characterizing sand and gravel deposits

    Ellefsen, Karl
    [Reston, Va.] : U.S. Department of the Interior, U.S. Geological Survey, 1998.

    Online aslwww.cr.usgs.gov

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