| Reference | {Deposit:: POPOFF,C.C.,1965, AN EVALUATION OF THE WESTERN PHOSPHATE}{Deposit:: INDUSTRY AND I* RESOURCES,PT.2, MONTANA, USBM RI 6611.}{Deposit:: SWANSON, R.W., 1970, MIN. RES. IN PERMIAN ROCKS OF SW}{Deposit:: MONTANA: USGS PROF. PAPER 313-E.}{Geology:: MONTANA INDUSTRIAL MINERALS,MINOBRAS 1975 PG 13} |