Columbia subject headings:
Harvard subject headings:
Nicaragua--Foreign relations--United States.
Nicaragua--History--1838-1909.
Nicaragua--History--1909-1937.
Nicaragua--History--1937-1979.
United States--Foreign relations--Nicaragua.
Princeton subject headings:
Nicaragua--Foreign relations--United States.
Nicaragua--History--1838-1909.
Nicaragua--History--1909-1937.
Nicaragua--History--1937-1979.
United States--Foreign relations--Nicaragua.