Although The New Grove Dictionary of Music and Musicians focuses on Western art music, you will find information on world musics. "Groves" is available in the reference section of the Fine Arts Library (REF ML100 .N48 2000) and online through Oxford Music Online.
See also The New Grove Dictionary of Musical Instruments in the Reference section REF ML102 .I5 N48 1984
A ten-volume set with CDs, The Garland Encyclopedia of World Music includes general introductions, articles by notable scholars, maps, musical examples, glossaries, bibliographies, discographies and more. Each volume deals with the music of a particular region of the world.
Produced by JVC in collaboration with a Smithsonian/Folkways Recordings and Multicultural Media, The JVC Video Anthology of World Music and Dance is a 30 volume DVD set, with nine accompanying booklets, containing over 500 performances from 100 countries.
World Regions: Africa--Caribbean--Central America--Central Asia--East Asia--Europe--Middle East/West Asia--North America--Oceania--South America--Southeast Asia
DVD1144, v. 1-30
DVD1141, bk. 1-9