Columbia subject headings:
Peru--Foreign relations--1980---Congresses.
Peru--Foreign relations--South America--Congresses.
South America--Foreign relations--Peru--Congresses.
Harvard subject headings:
Peru--Foreign relations--1968---Congresses.
Peru--Foreign relations--South America--Congresses.
South America--Foreign relations--Peru--Congresses.
Princeton subject headings:
Brazil--Foreign relations--Peru.
Colombia--Foreign relations--Peru.
Ecuador--Foreign relations--Peru.
Peru--Foreign relations--Brazil.
Peru--Foreign relations--Colombia.
Peru--Foreign relations--Ecuador.