Book excerpt: This text has been the standard guide to source literature of music and contains critically annotated listings of over 3,500 key sources. This comprehensive guide to reference sources is organized into chapters by category of source. The text's organization introduces students to a vast array of sources to include: Dictionaries and Encyclopedias; Histories and Chronologies; Sources of Systematic and Historical Musicology; Bibliographies of Music, Music Literature, and Music Business; Reference Works on Individual Composers and Their Music; Catalogs of Libraries and Musical Instrument Collections; Discographies; Yearbooks; Directories; Electronic Resources.