| Reference | {Deposit:: BRITISH SULPHUR CORP. LTD., 1980: WORLD SURVEY OF PHOSPHATE DEPOSITS, 4TH ED., LONDON}{Deposit:: JAYAWARDENA, D.E. DE S., 1980: THE OCCURRENCE OF ROCK PHOSPHATE DEPOSITS IN SRI LANKA IN RELATION TO THE PRECAMBRIAN BASEMENT. EAST-WEST RESOURCE SYSTEMS INSTITUTE, HONULULU}{Deposit:: PHOSPHORUS AND POTASSIUM, NO.114, 1981, LONDON} |