Columbia subject headings:
Europe--Politics and government--1918-1945.
Hungary--Boundaries--Poland.
Poland--Boundaries--Hungary.
Zakarpatsʹka oblastʹ (Ukraine)--History.
Harvard subject headings:
Czechoslovakia--History--1918-1938.
Europe--Politics and government--1918-1945.
Hungary--Boundaries--Poland.
Hungary--History--1918-1945
Poland--Boundaries--Hungary.
Zakarpatsʹka oblastʹ (Ukraine)--History.
Princeton subject headings:
Hungary--Boundaries--Poland.
Hungary--Foreign relations--Poland.
Poland--Boundaries--Hungary.
Poland--Foreign relations--Hungary.