| Note | chorus OPUS, founded 1925 by conductor Vilém Steinman, 1942-1944 A. Šebestík, 1954-1956 Zdeněk Zouhar, during Zouhars period OPUS premiered B. Martinů´s Primrose H. 348, Three sacred songs H. 339, Three Part Songs H. 338, Opening of the Wells H. 354; Martinů dedicated to OPUS the 2 and 5 part Primrose H. 348 |