Harvard College Library An extensive bibliography of digital scores with links to collections of popular, patriotic and classical music. Collections include digitised scores from Bach to Hoagy Carmichael to the Llibre vermell de Monserrat. This is an authoritative, up-to-date source for worldwide links to web sites maintained by the Loeb Music Library, Harvard University.
The Sheet Music Consortium provides tools and services that promote access to and use of online sheet music collections by scholars, students, and the general public. Includes collections from major libraries including the Library of Congress, National Library of Australia, and major US university collections.