| Reference | {Deposit:: BUREAU OF MINES MINERALS YEARBOOK; PHOSPHATE ROCK, DEPT. OF}{Deposit:: THE INTERIOR, BUREAU OF MINES, 1977, P. 19.}{Deposit:: E/MJ; JANUARY 1980 , P. 94.}{Deposit:: NO DATA ON THIS PLANT IN 1992, BLUE, JOHNSON & ASSOCIATES}{Deposit:: WORLD PLANT DATABASE & OUTLOOK, 3ED.} |