Continuum Encyclopedia of Popular Music of the World. Ed. by John Shepherd et al. New York: Continuum, 2003– . 9 vols.
Baker's Biographical Dictionary of Musicians. 6 vols. [print] This highly respected work covers groups as well as individuals. Of special interest are the indexes by nationality and genre (by historical period for people in art music) and the index listing women composers and musicians.
MUSICMEDIA REFERENCE ML105 .B16 2001