| 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:: FETTKE, C. R., 1924, THE GEOLOGY OF THE HUMACAO DISTRICT, PORTO RICO: NEW YORK ACAD. SCI., SCI. SURVEY PORTO RICO AND VIRGIN ISLANDS, V. 2, PT. 2, P. 117-197.} |