Geologic maps of the underground workings of the Black Rock and Sally uranium mines, Navajo County, Arizona, with a text by W.L. Chenoweth

Gray, I.B., and Ciesiel, Robert, 1991, Geologic maps of the underground workings of the Black Rock and Sally uranium mines, Navajo County, Arizona, with a text by W.L. Chenoweth: Arizona Geological Survey Contributed Report CR-91-A, 6 p., 1 sheet, scale 1:170.