This guide to Danish music presents an annotated bibliography and a directory of organizations, institutions and facilities in the world pertaining to 20th century Danish music. The bibliography includes printed media of composers, music, music theories, musical developments and general musical life in Denmark in the 20th century with an emphasis on the post-Nielsen era (1931-present). This reference tool encompasses books, references sources, bibliographies, catalogues, discographies, journals, periodicals and articles in all languages, as well as rare and out-of-print editions of historical significance. The research directory is an annotated register of organizations connected with Danish concert music, such as information services, research facilities, music organizations and professional associations. In addition to the resource information provided, the text includes an overview of Danish music and historical background on influential figures and musical developments.