Correspondence in subject [X]
Katz, Phyllis in subject [X]
Sound recordings in subject [X]
Audiocassettes in subject [X]
Dayton (Ohio) -- Music in subject [X]
Katz, Paul, 1907-1989 -- Manuscripts in subject [X]
Dayton Philharmonic Orchestra -- History in subject [X]
Photographs -- 20th century in subject [X]