Klein, D.P., and Kucks, R.P., 1991, Gravity and aeromagnetic anomaly maps of the Ajo and Lukeville 1o x 2o quadrangles, southwestern Arizona: U.S. Geological Survey Miscellaneous Investigations Series Map I-2139, 3 sheets, scale 1:250,000.
Klein, D.P., and Kucks, R.P., 1991, Gravity and aeromagnetic anomaly maps of the Ajo and Lukeville 1o x 2o quadrangles, southwestern Arizona: U.S. Geological Survey Miscellaneous Investigations Series Map I-2139, 3 sheets, scale 1:250,000.
Map, Magnetic Survey, Gravity Survey, Bedrock,