Browse the shelves for books on the history of singing: ML1460
Books on choral music: ML1500-
Books on opera: ML1700
Books on musicals: ML2054
These sources may list articles not listed in BartonPlus:
Many print-only dictionaries, indexes, and thematic catalogs are available in the library.
Songs in collections may not be listed in Barton; use print-only bibliographies and indexes to locate these songs. See especially Ref ML128.S3 and Ref ML120.U5.S5.
Writing guides for music: see the Ref ML3797 section in the library