Reference | {Deposit:: RECORDS OF THE CORTEZA TERRESTRE (SURFACE MINING PERMITS OFFICE), PUERTO RICO DEPARTMENT OF NATURAL RESOURCES, 1991.}{Deposit:: BROEDAL, C.H., 1961, PRELIMINARY GEOLOGIC MAP SHOWING IRON AND COPPER PROSPECTS IN THE JUNCOS QUADRANGLE, PUERTO RICO: U.S. GEOLOGICAL SURVEY MISCELLANEOUS INVESTIGATIONS MAP I-326, SCALE 1:20,000.} |