Mineral resources of the Gibralter Mountain and Planet Peak Wilderness Study Areas, La Paz County, Arizona

Eppinger, R.G., Peterson, J.A., Blank, H.R., Jr., Livo, K.E., Knepper, D.H., Jr., Pitkin, J.A., Spencer, J.E., Reynolds, S.J., Grubensky, M.J., Kreidler, T.J., and Scott, D.C., 1990, Mineral resources of the Gibralter Mountain and Planet Peak Wilderness Study Areas, La Paz County, Arizona: U.S. Geological Survey Open-File Report 90-0512, 36 p.