| Reference | {Deposit:: ANONYMOUS, ANGOLA IS ALSO TO CAPITILIZE ON ITS PHOSPHATE}{Deposit:: ROCK RESERVES. FERTILIZERS INTERNATIONAL, APRIL 1981.}{Deposit:: ANONYMOUS. ANGOLAN PHOSPHATE MINING. MINING JOURNAL,}{Deposit:: MARCH 13, 1981.}{Deposit:: BRITISH SULPHUR, WORLD SURVEY OF PHOSPHATE DEPOSITS, 4TH}{Deposit:: EDITION, 1980.}{Deposit:: E & MJ,JANUARY, 1985, P.40.} |