Gold-bearing collapse-breccia pipe, Copper Mountain, northwestern Arizona, in Dickinson, K.A., ed., Short papers of the U.S. Geological Survey Uranium Workshop, 1990

Adamek, Paul, Behr, H.J., and von Pechmann, Edmund, 1992, Gold-bearing collapse-breccia pipe, Copper Mountain, northwestern Arizona, in Dickinson, K.A., ed., Short papers of the U.S. Geological Survey Uranium Workshop, 1990: U.S. Geological Survey Circular 1069, p. 51-53.