- Long-distance relationships35
- Love songs1
- Manuscript leaves5
- Manuscripts, French2
- Manuscripts, French--Specimens1
- Manuscripts, French--Specimens.1
- Manuscripts, Medieval17
- Manuscripts, Medieval--France3
- Manuscripts, Medieval--Specimens1
- Manuscripts--France3
- Manuscripts--Switzerland1
- Marches1
- Marches (Voice with piano)12
- Marches (voice with piano)5
- Marne River (France)1
- Marne, 2nd Battle of the, France, 1918--Pictorial works1
- Martin, Frank A.--Correspondence1
- Medicine, Military1
- Memorials1
- Meuse-Argonne American Cemetery, France--Pictorial works1