en: He belonged to the Jewish section of the Prewar Association of Writers and Composers in Warsaw . He belonged to the Jewish Section of the prewar Association of Theatrical Authors And Composers in Warsaw .
ms: Beliau tergolong dalam bahagian Yahudi Persatuan Penulis dan Kompos Prawar di Warsaw. Beliau tergolong dalam Bahagian Yahudi Persatuan Pengarang dan Komposer Teatrikal sebelum perang di Warsaw.