Die Musik in Geschichte und Gegenwart
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Die Musik in Geschichte und Gegenwart (MGG) is the largest and most comprehensive German music encyclopedia, and among Western music reference sources, only The New Grove Dictionary of Music and Musicians is comparable to it in size and scope. It is published by Bärenreiter-Verlag in collaboration with J. B. Metzler’sche Verlagsbuchhandlung.
The first edition (1949–1968, supplemented 1973–1986) comprises 17 volumes, of which two are supplement volumes, and one is an index or register. The current second edition (1994–2007, supplemented 2008) consists of a subject encyclopedia (Sachteil) in 10 volumes (including the index or register) and a biographical encyclopedia (Personenteil) in 17 volumes and an index or register volume, which are continuously updated. An additional supplement volume, addressing both subjects and personages, was published in May 2008.
A CD-Rom version of the second edition is also available in a few libraries, mainly in Germany.