- McCrae, John, 1872-1918--Musical settings1
- Mehlinger, Artie--Portraits2
- Mexico--History--Revolution, 1910-1920--Songs and music5
- Military music1
- Military music--United States1
- Military pensions--United States--Songs and music1
- Military readiness--Songs and music1
- Militia of Mercy (U.S.)--Songs and music1
- Minstrel music--Vocal scores with piano1
- Mons, 1st Battle of, Mons, Belgium, 1914--Songs and music1
- Morey, Harry--Portraits1
- Morton, Clara, 1881 or 2-1948--Portraits1
- Mothers and sons--Songs and music1
- Mothers of soldiers--Pictorial works1
- Mothers of soldiers--Songs and music4
- Mothers of war casualties--Songs and music1
- Mothers--Songs and music9
- Motion picture music1
- Murray, Elizabeth--Portraits1
- Murray, Katherine--Portraits1