Columbia subject headings:
Czechoslovakia--Boundaries--Hungary.
Czechoslovakia--Foreign relations--1918-1938.
Hungarians--Czechoslovakia.
Hungary--Boundaries--Czechoslovakia.
Hungary--Boundaries--Slovakia.
Hungary--Foreign relations--1918-1945.
Slovakia--Boundaries--Hungary.
Slovakia--Foreign relations--1939-1945.
Harvard subject headings:
Czechoslovakia--Boundaries--Hungary.
Czechoslovakia--Foreign relations--1918-1938.
Hungarians--Czechoslovakia.
Hungary--Boundaries--Czechoslovakia.
Hungary--Boundaries--Slovakia.
Hungary--Foreign relations--1918-1945
Slovakia--Boundaries--Hungary.
Slovakia--Foreign relations--1939-1945.
Princeton subject headings:
Czechoslovakia--Boundaries--Hungary.
Czechoslovakia--Foreign relations--1918-1938.
Hungarians--Czechoslovakia.
Hungary--Boundaries--Czechoslovakia.
Hungary--Boundaries--Slovakia.
Hungary--Foreign relations--1918-1945.
Slovakia--Boundaries--Hungary.
Slovakia--Foreign relations--1939-1945.