Columbia subject headings:
Canada--Foreign relations--United States.
Latin America--Foreign relations--United States.
United States--Foreign relations--Canada.
United States--Foreign relations--Latin America.
Harvard subject headings:
Canada--Foreign relations--United States.
Latin America--Foreign relations--United States.
United States--Foreign relations--Canada.
United States--Foreign relations--Latin America.
Princeton subject headings:
Canada--Foreign relations--United States.
Latin America--Foreign relations--United States.
United States--Foreign relations--Canada.
United States--Foreign relations--Latin America.