Creator
- Mason, C. B.4
- Mason, J. B.7
- Mason, James E. (James Edward), 1859-1
- Mason, M. C. B. (Madison Charles Butler), 1859-1915.2
- Mason, Nelson.1
- Massachusetts Prison Association.1
- Massachusetts Racial Protection Association.3
- Massachusetts Racial Protective Association.1
- Massachusetts Suffrage League.2
- Massey, David4
- Mastin, Claudius H. (Claudius Henry), 1826-1898.1
- Mastro, Frank2
- Mathesius, Johann, 1504-1565.1
- Mathews Art Service (N.Y.)1
- Mathews Post Card Service (N.Y.)1
- Mathias, Ted.1
- Matthews, Kate, 1870-1956.1
- Matthews, William E.2
- Matthiessen, Frederic G.1
- Mattingly & Bronston (Lexington, Ky.)1