| Reference | {Deposit:: INTERNATIONAL FERTILIZER INDUSTRY ASSOCIATION. PHOSPHORIC}{Deposit:: ACID, TRIPLE SUPERPHOSPHATE AND AMMONIUM PHOSPHATE PLANTS}{Deposit:: 1988 SURVEY, AUGUST 1988, 39PP.}{Deposit:: BRITISH SULPHUR CORPORATION. WORLD FERTILIZER ATLAS, EIGHTH}{Deposit:: ED. APRIL 1987, 121PP.}{Deposit:: PHOSPHORUS & POTASSIUM, NO. 187, P. 10 (SEPT.-OCT. 1993).} |