Jānis Liepiņš was a conductor for which opretta composed by Johann Strauss II?
Die Fledermaus Die Fledermaus (] , "The Bat", sometimes called "The Revenge of the Bat") is an operetta composed by Johann Strauss II to a German libretto by and Richard Genée.
Gustave Doret Gustave Doret (20 September 1866 – 19 April 1943) was a Swiss composer and conductor.