Library of Congress
Innen: Amerikai Magyar Lexikon
- World Communist Movement. Selected chronology 1818 – 1957. Volume I. 1818 – 1945, Washington, 1960. (Congress, Comm. on Un-American Activities), 232 old.
- Bakó Elemér, – Sólyom-Fekete Vilmos: Hungarians in Rumania and Transilvania. A bibliographical list of publications in Hungarian and West-European languages compiled from the holdings of the Library of Congress, Washington D. C., 1966, 193 oldal (Horecky, 1817)
