Columbia subject headings:
Andes Region--History--Congresses.
Argentina--Boundaries--Chile--Congresses.
Argentina--History--Congresses.
Argentina--Relations--Chile--Congresses.
Chile--Boundaries--Argentina--Congresses.
Chile--History--Congresses.
Chile--Relations--Argentina--Congresses.
Harvard subject headings:
Argentina--Boundaries--Chile.
Chile--Boundaries--Argentina.
Princeton subject headings: