Columbia subject headings:
Ecuador--Boundaries--Peru.
Ecuador--Foreign relations--Peru.
Ecuador-Peru Conflict, 1941.
Peru--Boundaries--Ecuador.
Peru--Foreign relations--Ecuador.
Harvard subject headings:
Ecuador--Boundaries--Peru.
Ecuador--Foreign relations--Peru.
Ecuador-Peru Conflict, 1941.
Peru--Boundaries--Ecuador
Peru--Foreign relations--Ecuador.
Princeton subject headings:
Ecuador--Foreign relations--Peru.
Peru--Foreign relations--Ecuador.