Name
- Hürlimann, Martin, Swiss publisher and photographer, 1897-19842
- Inter-American Institute of Musicology, 1938-2
- J. A. H. Wagenaar, of Utrecht; music dealers, fl 1947-19592
- John Curwen and Sons, Ltd, music publishers, 1897-19692
- Josef Weinberger, music publishers, 1885-2
- London Bach Group, 1957-19612
- Lowe and Brydone Ltd., printers of London, fl 1939-19612
- Malmström, of Malmö; music dealers, fl 1956-19592
- Matthay, Tobias Augustus, pianist, 1858-1945, http://isni.org/isni/000000...2
- Mayer, Robert, Knight, music patron, 1879-19852
- Małcużyński, Witold, Polish pianist, 1914-1977, http://isni.org/isni/000000...2
- McAllister, Gilbert, journalist and Member of Parliament, 1906-1964, http://isni.org/isni/000000...2
- McCredie, Andrew Dalgarno, Australian musicologist, 1930-20062
- Millar, Norman K, music administrator, 1906-19912
- Molenaar Edition, Dutch music publishers, 1933-2
- Mooser, Robert-Aloys, musicologist and music critic, 1876-19692
- Musicians' Union, United Kingdom, 1921-2
- Muziekhandel W. Bojanus, of Batavia, fl 1939-19412
- Müller und Schade, of Bern; Swiss music publishers, 18502
- Omloo & Van der Wal, of Amsterdam; music dealers, fl 1956-19592