Columbia subject headings:
Argentina--Relations--Brazil.
Brazil--Relations--Argentina.
Diplomacy.
Monroe doctrine.
South America--Foreign relations.
Harvard subject headings:
Argentina--Relations--Brazil.
Brazil--Relations--Argentina.
Diplomacy
Monroe doctrine
South America--Foreign relations.
Princeton subject headings:
Argentina--Relations--Brazil.
Brazil--Relations--Argentina.
Diplomacy.
Monroe doctrine.
South America--Foreign relations.