| Reference | {Deposit:: ASHLEY, B. E., AND BRIGGS, R. C., 1970, THE MINERAL INDUSTRY OF COSTA RICA, IN MINERALS YEARBOOK 1970: U.S. BUREAU OF MINES YEARBOOK, V. 3, P. 898.}{Deposit:: U.S. GEOLOGICAL SURVEY, DIRECCION GENERAL DE GEOLOGIA, MINAS E HIDROCARBUROS, UNIVERSIDAD DE COSTA RICA, 1987, MINERAL RESOURCE ASSESSMENT OF THE REPUBLIC OF COSTA RICA: U.S. GEOLOGICAL SURVEY MISCELLANEOUS INVESTIGATION SERIES MAP I-1865, 75 P.} |