Columbia subject headings:
Harvard subject headings:
Hungary--History--Revolution, 1918-1919
Károlyi, Mihály, 1875-1955
Kun, Béla, 1886-1939.
Károlyi, Mihály, gráf, 1875-1955.
Princeton subject headings:
Hungary--History--Revolution, 1918-1919.
Károlyi, Mihály, gráf, 1875-1955
Kun, Béla, 1886-1939.