- Marches1
- Marne, 2nd Battle of the, France, 1918--Pictorial works1
- Martin, Frank A.--Correspondence1
- Meuse-Argonne American Cemetery, France--Pictorial works1
- Missals--France--Illustrations1
- Mothers of soldiers--Songs and music1
- Mothers of war casualties--Songs and music1
- Murray, Elizabeth--Portraits1
- Music--Manuscripts--France--Illustrations1
- Musicals1
- Musicals--Excerpts, Arranged1
- National songs1
- National songs--Belgium1
- National songs--Great Britain1
- Peace--Songs and music1
- Pershing, John J. (John Joseph), 1860-19481
- Pershing, John J. (John Joseph), 1860-1948--Portraits1
- Piano music1
- Piantadosi, Al, 1884-1955--Portraits1
- Popular music--United States--1921-19301