Subject
- Money orders1
- Monuments1
- Morrison, Philip1
- Motion pictures1
- Mountaineers1
- Mozart, Leopold, 1719-17871
- Mukhopadhyaya, J.1
- Munn, Liddy and Glaccum1
- Musical instruments1
- Mustard gas1
- Müller, Rudolf1
- Mycologists1
- Müller, Wolf Johannes, (1874-1941)1
- Münchner Illustrierte Presse1
- National City Bank of New York1
- National Conference of Jews and Christians (U.S.)1
- National Council of Jewish Women. New York Section1
- National Research Council of Canada1
- National Science Foundation (U.S.)1
- Nationalism1