- Group for Contemporary Music3
- Guaita, Giovanni, 1915-1
- Guigui, Efraín1
- Gutchë, Gene, 1907-20001
- Hamilton, Iain, 1922-20001
- Handel, George Frideric, 1685-17591
- Harrison, Lou, 1917-20031
- Heldrich, Claire1
- Hindemith, Paul, 1895-19631
- Hodeir, André, 1921-20113
- Hoiby, Lee1
- Hovhaness, Alan, 1911-20001
- Huggler, John1
- Humble, Keith1
- Humphrey, Doris, 1895-19581
- Husa, Karel, 1921-20161
- Ichiyanagi, Toshi, 1933-20221
- Ives, Charles, 1874-19541
- Jolivet, André, 1905-19741
- Juilliard String Quartet1
- Kansas City Philharmonic Orchestra1
- Kellogg, Peter Paul, 1899-19752
- Kleinsasser, William, 1961-1
- Knepper, Jimmy, 1927-20033
- Koto nski, W odzimierz1
- Kotoński, Włodzimierz1
- Kraft, Robert, 1869-19161
- Kreiger, Arthur, 1945-29
- Kreutz, Arthur, 1906-19911
- Krosnick, Joel2
- Kurka, Robert, 1921-19572
- Kuznetsov, Anatoli, 1929-19791
- LaPorta, John3
- Le Caine, Hugh, 1914-19771
- Levy, Marvin David3
- Lewin, David, 1933-20031
- Lidov, David, 1941-1
- List, Eugene, 1918-19851
- Loft, Abram, 1922-20192
- Loriod, Jeanne1
- Loriod, Yvonne1
- Los Angeles Philharmonic Orchestra2
- Luening, Otto, 1900-1996289
- Lybbert, Donald1
- M.I.T. Experimental Electronic Music Studio1
- Maceda, José1
- Macero, Teo, 1925-20081
- Maderna, Bruno1
- Marshall, Wendell3
- Massachusetts Institute of Technology1
- Masselos, William2
- Mauzey, Peter, 1930-1
- Mayer, William, 1925-20172
- Mayuzumi, Toshir o, 1929-19971
- McDowell, John Herbert1
- McKusick, Hal, 1924-20123
- Mennin, Peter1
- Messiaen, Olivier, 1908-19921
- Meyer-Eppler, W. (Werner)2
- Milhaud, Darius, 1892-19742