"RISM -- the Répertoire International des Sources Musicales (International Inventory of Musical Sources) -- represents a worldwide effort to identify and describe sources of music and writings about music from the earliest times through ca. 1850." -- RISM

RISM-U.S. Libretto Database
The RISM-U.S. Libretto Database contains bibliographic records for more than 11,000 printed and manuscript libretti for musical stage pieces from the earliest manifestations through the beginning of the twentieth century. Presently included in the database are records for all libretti in the Albert Schatz Collection at the Library of Congress.

RISM Bibliographic Citations Database
The RISM Bibliographic Citations Database contains references for all thematic catalogues and other secondary sources cited in the RISM A/II Music Manuscripts Database and the RISM-US Libretto Database. The database can be searched from hyperlinks in those database, or directly from a database search menu

RISM Libraries Directory
The RISM Libraries Directory identifies more than 5,500 libraries world-wide that hold music materials relevant to RISM series. All libraries are identified by name and RISM siglum. Other information provided can include: address, phone/fax numbers, links to relevant Internet resources, and literature about the library.

RISM Series A/II: Music MSS After 1600
The RISM Series A/II Database contains bibliographic records for music manuscripts written after ca. 1600 and, in most cases, before ca. 1850. Records include information in standard bibliographic categories as well as graphical images of music incipits. RISM Series A/II is also published on CD-ROM; see below for detailed information.