- Humphrey, Hubert H. (Hubert Horatio), 1911-19781
- Inaugural Committee (U.S.: 1957)1
- Jacques [?]1
- Jarvis, Maxwell1
- Johnson1
- Jona?s, Alberto, 1868-19431
- Kemp, Mrs. David F.1
- Koussevitzky, Serge, 1874-19511
- Labunski, Wiktor, 1895-19741
- Lawrence, Robert, 1912-19811
- Lehmann, Lotte1
- Leschetizky, Annette Essipova1
- Mannes, David, 1866-19591
- Mellos1
- Melville-[L], Marguerite1
- Menotti, Gian Carlo, 1911-20071
- Miller, Philip Lieson, 1906-19961
- Missouri State Music Teachers Association1
- Mitropoulos, Dimitri, 1896-19601
- Moiseiwitsch, Anna1