Columbia subject headings:
Argentina--Boundaries--Chile.
Argentina--Foreign relations--Chile.
Chile--Boundaries--Argentina.
Chile--Foreign relations--Argentina.
Harvard subject headings:
Argentina--Boundaries--Chile.
Argentina--Foreign relations--Chile.
Chile--Boundaries--Argentina.
Chile--Foreign relations--Argentina.
Princeton subject headings:
Argentina--Boundaries--Chile.
Argentina--Foreign relations--Chile.
Chile--Boundaries--Argentina.
Chile--Foreign relations--Argentina.