Columbia subject headings:
Nicaragua--Foreign relations--United States.
Nicaragua--History--1909-1937.
United States--Foreign relations--Nicaragua.
Harvard subject headings:
Nicaragua--Economic conditions--1918-1979.
Nicaragua--Foreign relations--United States.
Nicaragua--History--1909-1937.
Nicaragua--Relations--United States.
United States--Foreign relations--Nicaragua.
United States--Relations--Nicaragua.
Princeton subject headings:
Nicaragua--Economic conditions--1918-1979.
Nicaragua--Foreign relations--United States.
Nicaragua--History--1909-1937.
United States--Foreign economic relations--Nicaragua.
United States--Foreign relations--Nicaragua.