"Entrée" and "Couplet Oberst Ollendorf" from the operetta "Der Bettelstudent" ("The Beggar Student") "Entrée" and "Couplet Oberst Ollendorf" from the operetta "Der Bettelstudent" ("The Beggar Student") Main opus "Der Bettelstudent" ("The Beggar Student"), Operetta in three acts