| 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:: SWANSON, R.W., 1970, MIN. RES. IN PERMIAN ROCKS OF SW}{Deposit:: MONTANA: USGS PROF. PAPER 313-E.}{Deposit:: PETERSON, J.A., 1954, STRAT. SECS. OF THE PHOSPHORIA FM.}{Deposit:: IN MONTANA, 1951: USGS CIRC. 326, 27 PP.} |