| Reference | {Deposit:: POPOFF, C.C., 1965, AN EVALUATION OF THE WESTERN PHOSPHATE}{Deposit:: INDUSTRY AND ITS RESOURCES, PART 2, MONTANA, USBM RI 6611}{Deposit:: P.73}{Deposit:: AND INDUSTRIAL DEVELOPMENT DEPARTMENT. PHOSPHATE REPORT,}{Deposit:: 1958, P81.}{Deposit:: SWANSON, R.W., 1953B, STRATIGRAPHIC SECTIONS OF THE PHOSPHOR}{Deposit:: IA FORMATION IN MONTANA, PART W2, 1949-1950: USGS CIRC. 303,}{Deposit:: 21PP.} |