For singers and others looking for English translations: a very useful guide from the University of Michigan. The UCSB Library holds nearly all the resources cited here, but check the UC Library Search to make sure you have the correct call number.
The most authoritative encyclopedia of the world's music. In-depth coverage of all regions of the world, with specific information on genres, practices, instruments, musicians. Illustrated with photographs, maps, charts. Extensive bibliographies.
Entries for over 250 operas, each including a plot synopsis and cast list as well as information on the singers of the original production and other historical information.
Includes full text of New Grove Dictionary of Music and Musicians 2nd ed. (2001), New Grove Dictionary of Jazz 2nd ed. (2002), and New Grove Dictionary of Opera (1992).
Includes the entire Grove Music Online as well as Oxford Companion to Music (2002) and Oxford Dictionary of Music 2d ed. (2006). These three works can be searched separately or in one combined search.