Geology : / Dennis P. Cox. Cox, Dennis P. Porphyry Puerto Rico Tanamá Region. Copper ores Puerto Rico Tanamá Region. QE462.P6 C69 1985 551 19 COG One map on folded leaf in pocket. Bibliography: p. 58-59. Washington : U.S. G.P.O., 1985. 1985. 1985 Text iv, 59 p. : eng Puerto Rico Tanamá Region. Puerto Rico Tanamá Region.