| Reference | {Deposit:: THE BRITISH SULPHUR CORP. LTD., 1980: WORLD SURVEY OF PHOSPHATE DEPOSITS, 4TH ED., LONDON}{Deposit:: NOTHOLT, A.J.G., 1979: THE ECONOMIC GEOLOGY AND DEVELOPMENT OF IGNEOUS PHOSPHATE DEPOSITS IN EUROPE AND THE USSR. ECONOMIC GEOLOGY, VOL.74, P.339-350} |