Browse the shelves for jazz books: ML3506; ML3561.J3
Biographies of jazz composers: ML410
Biographies of jazz performers: ML421-ML422
These sources may list articles not listed in BartonPlus:
Many print-only encyclopedias and bibliographies are available in the library; see especially Ref ML102.J3 and Ref ML128.J3.
Writing guides for music: see the Ref ML3797 section in the library