Columbia subject headings:
Czechoslovakia--Foreign relations--Hungary.
Hungary--Foreign relations--1918-1945.
Hungary--Foreign relations--Czechoslovakia.
Hungary--Relations--Slovakia.
Slovakia--Relations--Hungary.
Harvard subject headings:
Czechoslovakia--Foreign relations--Hungary.
Hungary--Foreign relations--Czechoslovakia.
Slovakia--Politics and government.
Princeton subject headings:
Hungary--Boundaries--Slovakia.
Hungary--Foreign relations--Slovakia.
Slovakia--Boundaries--Hungary.
Slovakia--Foreign relations--Hungary.