Reference | {Deposit:: A.H. STEVENS, 1968, ECONOMIC POTENTIAL ON MICHIGA* GYPSUM DEPOSITS, CONSUMER POWER COMPANY, JACKSON, MICHIGAN.}{Deposit:: L.I. BRIGGS, 1970, GEOLOGY OF GYPSUM IN THE LOWER PENINSULA, MICHIGAN, PROCEEDINGS SIXTH FORUM ON GEOLOGY OF INDUSTRIAL MINERALS, MISC 1, GEOLOGICAL SURVEY DIVISION, MICHIGAN DEPARTMENT OF NATURAL RESOURCES.}{Production:: U.S. BUREUA OF MINES} |