| Reference | {Deposit:: POPOFF, C.C., 1965, AN EVALUATION OF THE WESTERN PHOSPHATE}{Deposit:: INDUSTRY AND ITS RESOURCES, PART 2, MONTANA, USBM RI 6611,}{Deposit:: 145 PAGES}{Deposit:: LUFT, STANLEY, 1958, NORTHERN PACIFIC RAILWAY COMPANY,}{Deposit:: PROPERTIES AND INDUSTRIAL DEVELOPMENT DEPARTMENT, PHOSPHATE}{Deposit:: REPORT, 106 PAGES} |