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