Reference | {Deposit:: COX, DENNIS P., AND BRIGGS, REGINALD P., 1973, METALLOGENIC MAP OF PUERTO RICO: U.S. GEOLOGICAL SURVEY, MISCELLANEOUS GEOLOGIC INVESTIGATIONS MAP I-721, ACCOMPANIED BY EXPLANATORY PAMPHLET, 6 P.}{Deposit:: MITCHELL, R. C., 1954, A SURVEY OF THE GEOLOGY OF PUERTO RICO: PUERTO RICO UNIV. AGR. EXPT. STA. TECH. PAPER 13, 167 P.}{Production:: MITCHELL, 1954, P. 109.} |