Columbia subject headings:
Harvard subject headings:
Spain--Foreign relations--United States.
Spain--History--Civil War, 1936-1939--Diplomatic history.
United States--Foreign relations--1945-1989.
United States--Foreign relations--Spain.
World War, 1939-1945--Diplomatic history.
Princeton subject headings:
Spain--Foreign relations--United States.
Spain--Politics and government--1939-1975.
United States--Foreign relations--Spain.