| 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 AND POTASSIUM, V. 151, SEPT.-OCT., 1987, P. 13.}{Deposit:: CHIAN DAILY NORTH AMERICAN EDITION, OCT. 31, 1991, P. 2.} |