These books list articles, books, and other sources about music of a specific medium or genre. They are shelved in Reference at ML 128, alphabetical by medium and genre.
The library has many bibliographies of music. Some are just lists of repertoire; some include more detailed information about works and composers.
Most of these are shelved in Reference at ML 128, alphabetically by medium (instrument, voice) and genre (chamber music, jazz, music theatre, etc.). A few examples:
Discographies are basically bibliographies of recordings. They vary in subject and coverage. Some cover a specific genre or performer.
Discographies are shelved at ML 156-ML 156.9 in Reference and General Stacks. A few examples: