The manuscript collection consists of manuscripts that are independent of the archival collections. An unpublished finding aid for the collection is available.
Manuscripts dated between 1600 and 1800 have been cataloged by RISM (Répertoire International des Sources Musicales/International Inventory of Musical Sources). The catalog records are available in both printed and electronic forms.
- Printed catalog: US Laum, the University of California at Los Angeles, Music Library: Thematic Catalogue of Music in Manuscript. International Inventory of Musical Sources: A/II. Joint Committee on RISM of the American Musicological Society and Music Library Association, 1993. Music Library Reference Stacks: ML 136 L84 U5495 1993.
- On the Web: RISM Online. To find UCLA Music Library records, include the Library siglum, US LAum, in the search.