Columbia subject headings:
Hungary--Relations--Poland.
Poland--Relations--Hungary.
Polish people--Hungary--History--20th century.
World War, 1939-1945--Concentration camps--Hungary.
World War, 1939-1945--Poland.
World War, 1939-1945--Refugees.
Harvard subject headings:
Polish people--Hungary.
World War, 1939-1945--Poland.
World War, 1939-1945--Refugees.
Princeton subject headings:
Polish people--Hungary--History.
World War, 1939-1945--Refugees.