Columbia subject headings:
Bach, Johann Sebastian, 1685-1750. Masses--Congresses.
Messiaen, Olivier, 1908-1992--Congresses.
Harvard subject headings:
Bach, Johann Sebastian, 1685-1750. Masses--Congresses.
Concert programs--Germany--Braunschweig.
Messiaen, Olivier, 1908-1992--Congresses.
Music festivals--Germany--Braunschweig.
Princeton subject headings:
Bach, Johann Sebastian, 1685-1750. Masses.
Concert programs.
Messiaen, Olivier, 1908-1992.