Reference | {Deposit:: FILES OF THE CORTEZA TERRESTRE (SURFACE MINING PERMITS OFFICE), PUERTO RICO DEPARTMENT OF NATURAL RESOURCES, 1991.}{Deposit:: MCINTYRE, D.H., 1971, GEOLOGIC MAP OF THE CENTRAL LA PLATA QUADRANGLE, PUERTO RICO: U.S. GEOLOGICAL SURVEY MISCELLANEOUS GEOLOGIC INVESTIGATIONS MAP I-660, SCALE 1:20,000.} |