Mineral resources of the Big Horn Mountains Wilderness Study Area, Maricopa County, Arizona, Chapter A, in Mineral Resources of Wilderness Study Areas - Western Arizona and part of San Bernardino County, California

Gray, F., Miller, R.J., Hassemer, J.R., Hanna, W.F., Brice, J.C., III, and Schreiner, R.A., 1987, Mineral resources of the Big Horn Mountains Wilderness Study Area, Maricopa County, Arizona, Chapter A, in Mineral Resources of Wilderness Study Areas - Western Arizona and part of San Bernardino County, California: U.S. Geological Survey Bulletin 1701-A, p. A1-A14, 1 sheet, scale 1:62,500.