Names
- Marsh, Pliny W., 1876-1
- Mather, Stephen Tyng, 1867-1930.1
- McArdle, Richard E. (Richard Edwin), 1899-1983.1
- McArdle, Richard Edwin, 1899-1
- McNamara, Patrick Vincent, 1894-1966.1
- Mellon, Andrew W. (Andrew William), 1855-1939.1
- Metcalf, Woodbridge, 1888-1
- Michigan Parks Association.1
- Michigan State Normal College.1
- Michigan. Dept. of Conservation.1
- Michigan. Fair Employment Practices Commission.1
- Michigan. Legislature.1
- Mid-Century Conference on Resources for the Future (Washington, D.C. : 1953)1
- Mitchell, William, 1879-1936.1
- Moore, Barrington1
- Moore, Barrington, 1913-2005.1
- Moore, Charles, 1855-1942.1
- Moss, Frank E., 1911-2003.1
- National Association of Biology Teachers.1
- National Popular Government League.1