Columbia subject headings:
Harvard subject headings:
Central America--Foreign relations--United States.
Geopolitics--Central America.
Nationalism--Central America--History--20th century.
Nicaragua--Politics and government--1909-1937.
United States--Foreign relations--Central America.
Princeton subject headings:
Central America--Foreign relations--United States.
Geopolitics--Central America.
Nationalism--Central America--History--20th century.
Nicaragua--Politics and government--1909-1937.
United States--Foreign relations--Central America.