Ref.: Schnabel, Lorraine, Welty, J.W., Trapp, R.A., and Reynolds, S.J. (1986) Bibliography for metallic mineral districts in Pima and Santa Cruz Counties, Arizona: Arizona Bureau of Geology and Mineral Technology Circular 26, 44 p.
Welty, J.W. (1988) Additions to bibliographies for metallic mineral districts in Cochise, Graham, Greenlee, La Paz, Mohave, Pima, Santa Cruz, and Yuma Counties, Arizona: Arizona Geological Survey Open-File Report 88-22, 32 p.