Columbia subject headings:
America.
Latin America--Defenses.
Latin America--Foreign relations.
United States--Defenses.
United States--Foreign relations.
Harvard subject headings:
America--Politics and government.
America.
Latin America--Defenses.
Latin America--Foreign relations.
United States--Defenses.
United States--Foreign relations.
Princeton subject headings:
Card, Orson Scott. America.
Latin America--Defenses.
Latin America--Foreign relations.
United States--Defenses.
United States--Foreign relations.