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