An abridged overview of some features of porphyry copper deposits in the American Southwest, in Thorman, C.H., and Lane, D.E., eds., USGS Research on Mineral Resources - 1994, Part B - Guidebook for Field Trips, Ninth V.E. McKelvey Forum...

Titley, S.R., 1994, An abridged overview of some features of porphyry copper deposits in the American Southwest, in Thorman, C.H., and Lane, D.E., eds., USGS Research on Mineral Resources - 1994, Part B - Guidebook for Field Trips, Ninth V.E. McKelvey Forum on Mineral and Energy Resources: U.S. Geological Survey Circular 1103-B, p. 15-23.