ML100
General Encyclopedia and Dictionaries
ML101
Geographical
ML102
Subject Dictionaries
ML105-ML107
Bio-Bibliographies
ML108
Terminology
ML109
Pronunciation
ML112.8-ML155
Bibliography (Bibliographies of music and bibliographies of works about music)
ML120
Bibliography by region or country
ML128
Topical Bibliography
ML132
Graded lists of music for teaching
ML134
Bibliographies of individual composers
ML385-ML429
History and Criticism Biographies
ML410(+cutter)
General biographies of composers