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