Grove Music
Oxford Music Online (OMO) is the access-point for Oxford music reference subscriptions and products, including Grove Music Online, The Oxford Companion to Music, The Oxford Dictionary of Music, and Encyclopedia of Popular Music. With OMO patrons can cross-search Grove and Oxford reference content in one location. Articles from specialist dictionaries such as The New Grove Dictionary of Opera and The New Grove Dictionary of Jazz, 2nd ed., are available via OMO.
Grove music online.
Oxford dictionary of music.
Oxford companion to music.
Encyclopedia of popular music (London, England)
New Grove dictionary of opera.
New Grove dictionary of jazz
Oxford University Press.