| Reference | {Deposit:: MONTANA INDUSTRIAL MINERALS, MINOBRAS, 1975, P. 14.}{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, P 701.}{Deposit:: MRB RPT 117, POPOFF, P. 94.} |