- Mexico City (Mexico)--Description and travel.3
- Military cadets.3
- Military education.3
- Miniature craft.3
- Miniature objects.3
- Miracle workers.3
- Mississippi River--Social life and customs.3
- Monkeys.3
- Monoplanes.3
- Moore, Arthur Harry, 1879-1952.3
- Morrow, Dwight W. (Dwight Whitney), 1873-1931.3
- Motion picture cameras.3
- Motion picture journalism.3
- Motorboats.3
- Motorcades--New York (State)--New York.3
- Murnau, F. W. (Friedrich Wilhelm), 1888-1931.3
- Museo nazionale di Castel Sant'Angelo.3
- Music.3
- Naval ceremonies, honors, and salutes.3
- New Orleans (La.)--Buildings, structures, etc.3