Found 3 collections related to Jewish composers -- United States -- 20th century

Isaacs, Lewis Montefiore, 1877-1944
Music Division | JPB 04-7
1 linear foot (2 boxes)
Lewis m. Isaacs (ca. 1877-1944) was born and raised in New York City. Although better known as a lawyer and for his friendship with the poet E.A. Robinson, Isaacs was also composer. This collection highlights Isaacs's less well known musical ability.
Gideon, Miriam, 1906-1996
Music Division | JPB 04-13
18.5 linear feet (22 boxes)
The papers of the American composer Miriam Gideon consist primarily of scores and sketches; they also include concert programs, press clippings, school notebooks and papers, personal writing and awards.
Heifetz, Vladimir, 1893-1970
Music Division | JPB 04-4
14.5 linear feet (21 boxes)
The papers of the Russian-American pianist and composer Vladimir Heifetz consist primarily of manuscripts scores: they also include some music and lectures