Reference | {Deposit:: FANTEL, R.J., SULLIVAN, D.E. AND PETERSON, G.R., 1983. PHOSPHATE ROCK AVAILABILITY--DOMESTIC: U.S. BUREAU OF MINES INFOR. CIRCULAR 8937, 57 P.}{Deposit:: FANTEL, R.J., ANSTETT, T.F., PETERSON, G.R., PORTERS, K.E. AND SULLIVANN, D.E., 1984. PHOSPHATE ROCK AVAILABILITY--WORLD: U.S. BUREAU OF MINES INFOR. CIRCULAR 8989, 65 P.}{Deposit:: CATHCART, J.B., SHELDON, R.P., AND GULBRANDSEN, R.A., 1984. PHOSPHATE-ROCK RESROUCES OF THE UNITED STATES: U.S. GEOLOGICAL SURVEY CIRCULAR 888, 48 P.}{Deposit:: VARIOUS U.S. BUR. OF MINES PROPERTY FILES.} |