Grove Music Online This link opens in a new windowProvides users access and cross-reference searching for 4 major music reference resources in one location: Grove Music Online, The Oxford Companion to Music, The Oxford Dictionary of Music, 2nd edition, and The Encyclopedia of Popular Music, 4th edition. The Oxford Companion to Music offers more than 8,000 articles on composers, performers, conductors, instruments, forms and genres. The Encyclopedia of Popular Music is the authoritative biographical encyclopedia of rock, pop, and jazz artists from 1900 to the present. The database also provides music history timelines and thematic topic guides.