Columbia subject headings:
Boundaries--History--20th century.
Territory, National--History--20th century.
World politics--1945-
Harvard subject headings:
Boundary disputes--History--20th century.
Territory, National--History--20th century.
World politics--1945-
Princeton subject headings:
Boundaries--History--20th century.
Territory, National--History--20th century.
World politics--1945-1989.