| Reference | {Deposit:: JOHNSON DONALD U US BU MINES HEALTH AND SAFETY REPT JEFFERSO}{Deposit:: MINE APRIL 28 1971}{Reserve-Resource:: JOHNSON, D. U. U. S. BUMINES, HEALTH AND SAFETY REPORT,}{Reserve-Resource:: JEFFERSON MINE, APRIL 28, 1971.}{Reserve-Resource:: WOOD, H. B. FLOURSPAR AND CRYOLITE. CHAPTER IN U.S.}{Reserve-Resource:: BUMINES MINERALS YEARBOOK, 1971, P. 518.} |