Reference | {Deposit:: SEPT. 23, 1975: ZOZAYA F., D., 1971, THE VENEZUELAN MINING I}{Deposit:: ITS PRESENT AND FUTURE IN THE NATIONAL DEVELOPMENT [SPAN]: M}{Deposit:: DIR. MIN. GEOL., 2ND. VENEZUELAN MINING AND METALLURGICAL JO}{Deposit:: 77P.}{Deposit:: WORLD SURVEY OF PHOSPHATE DEPOSITS, 5TH, ED, BRITISH SULPHUR}{Deposit:: CORP. LTD., LONDON ENGLAND, PP.81-83.} |