Names
- Maddy, Joseph E. (Joseph Edgar), 1891-1966.1
- Markley, Mary Elizabeth B., 1864-1956.1
- Mattern, David Earl, 1890-1959.1
- McCallum, George P. (George Porterfield), 1871-1952.1
- McClure, Harry H.1
- McLaughlin, Andrew Cunningham, 1861-1947.1
- McLouth, Lawrence Amos, 1863-1927.1
- McPeek, Russell Roy, 1862-1945.1
- Meader, George, 1907-1
- Meader, George, 1907-1994.1
- Mechem, Floyd R. (Floyd Russell), 1858-1928.1
- Michener, Earl C. (Earl Cory), 1876-1957.1
- Michener, Earl C. (Early Cory), 1876-1957.1
- Michigan and Indiana Retail Coal Association.1
- Moffit, John Ted, 1862-1947.1
- Moore, Earl Vincent, 1890-1987.1
- Morrill, J. L. (James Lewis), 1891-1979.1
- Morrill, James Lewis, 1891-1
- Murfin, James Orin, 1875-1940.1
- Murphy, Frank, 1890-1949.1