| Reference | {Deposit:: INTERNATIONAL FERTILIZER INDUSTRY ASSOCIATION. PHOSPHORIC}{Deposit:: ACID, TRIPLE SUPERPHOSPHATE AND AMMONIUM PHOSPHATE PLANTS}{Deposit:: 1988 SURVEY, AUGUST 1988, 39PP.}{Deposit:: BRITISH SULPHUR CORORATION, WORLD FERTILIZER ATLAS, 8ED,}{Deposit:: APRIL 1987, 121PP.} |