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  • Crustal extension and the peak Colorado River gravity high, southern Sacramento Mountains, California [microform] : a preliminary correlation / Erin A. Campbell and Barbara E. John.

    • Text
    • [Reston, Va.] : Dept. of the Interior, U.S. Geological Survey ; [Denver, Colo. : Books and Open-File Reports Section, distributor], 1994.
    • 1994

  • Preliminary geologic map of the eastern and northern parts of the Topock 7.5-minute quadrangle, Arizona and California [microform] / U.S. Department of the Interior, U.S. Geological Survey ; by Keith A. Howard, Barbara E. John, and Jane E. Nielson.

    • Cartographic
    • [Reston, Va.?] : The Survey, 1997.
    • 1997

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