| Reference | {Deposit:: POPOFF,C.C.,1965, AN EVALUATION OF THE WESTERN PHOSPHATE}{Deposit:: INDUSTRY AND I* RESOURCES,PT.2, MONTANA, USBM RI 6611.}{Deposit:: LUFT,S.,1958, NORTHERN PACIFIC RAILWAY CO. PROPERTIES AND}{Deposit:: INDUSTRIAL DEVELOPMENT DEPT. PHOSPHATE REPORT.}{Deposit:: CRESSMAN,E.R., 1953, STRAT. SECS. OF THE PHOSPHORIA FM IN}{Deposit:: MONTANA ,1949-50, PART 4: USGS CIRC. 302, 23 PP.}{Geology:: MONTANA INDUSTRIAL MINERALS,MINOBRAS 1975 PG 14} |