Reference | {Deposit:: U.S. GEOLOGICAL SURVEY CIRCULAR 209, 1953.}{Deposit:: LUFT,S.,1958, NORTHERN PACIFIC RAILWAY CO. PROPERTIES AND}{Deposit:: INDUSTRIAL DEVELOPMENT DEPT. PHOSPHATE REPORT.}{Deposit:: U.S. BUREAU OF MINES RI 6611, 1965, P. 105.}{Deposit:: U.S. GEOLOGICAL SURVEY PROF. PAPER 313-E, 1970.} |