Information About Franciszek Dukla
Richard K. Spottswood, “The Sajewski Story: Eighty Years of Polish Music in Chicago”, in Ethnic Recordings in America: A Neglected Heritage. Washington: American Folklife Center, Library of Congress, 1982
Richard K. Spottswood, Ethnic Music on Records: A Discography of Ethnic Recordings Produced in the United States, 1893 to 1942. Volume 2, Slavic. Urbana and Chicago: University of Illinois Press, 1990.
Victor Katalog Polskych Rekordów, Victor Polish Records General Catalog, 1931
Victor International Records, Kompletny Spis Rekordów Polskich, Complete List of Polish Records. January, 1940.