Columbia subject headings:
Nicaragua--Foreign relations--1979-
Nicaragua--Foreign relations--United States.
United States--Foreign relations--1981-1989.
United States--Foreign relations--Nicaragua.
Harvard subject headings:
Nicaragua--Foreign relations--1979-
Nicaragua--Foreign relations--United States.
United States--Foreign relations--1981-1989.
United States--Foreign relations--1989-
United States--Foreign relations--Nicaragua.
Princeton subject headings:
Nicaragua--Foreign relations--1979-
Nicaragua--Foreign relations--United States.
United States--Foreign relations--1981-.
United States--Foreign relations--Nicaragua.