File Mass Consolidated Mining Company, 1903-1925 Box 2, F 23 In: Michigan Mining Industries Collection, 1845-1990 » Michigan Mining Industries Collection
File Mayflower-Old Colony Copper Company, 1917-1929 Box 2, F 25 In: Michigan Mining Industries Collection, 1845-1990 » Michigan Mining Industries Collection
File Michigan Copper Mining Company, 1899-1921 Box 2, F 27 In: Michigan Mining Industries Collection, 1845-1990 » Michigan Mining Industries Collection
File Mine Inspector's Reports (folder 3 of 6), 1914-1919 Box 2, F 30 In: Michigan Mining Industries Collection, 1845-1990 » Michigan Mining Industries Collection
File Mohawk Mining Company (folder 2 of 2), 1914-1933 Box 2, F 36 In: Michigan Mining Industries Collection, 1845-1990 » Michigan Mining Industries Collection
File North Lake Mining Company, 1908-1922 Box 2, F 40 In: Michigan Mining Industries Collection, 1845-1990 » Michigan Mining Industries Collection
File Osceola Consolidated Mining Company, 1886-1922 Box 3, F 1 In: Michigan Mining Industries Collection, 1845-1990 » Michigan Mining Industries Collection
File Quincy Mining Company (folder 3 of 6), 1908-1918 Box 3, F 7 In: Michigan Mining Industries Collection, 1845-1990 » Michigan Mining Industries Collection
File Superior Copper Company, 1908-1923 Box 3, F 19 In: Michigan Mining Industries Collection, 1845-1990 » Michigan Mining Industries Collection
File Victoria Copper Mining Company, 1899-1925 Box 3, F 22 In: Michigan Mining Industries Collection, 1845-1990 » Michigan Mining Industries Collection