Columbia subject headings:
Spain--Civilization--20th century.
Spain--History--Civil War, 1936-1939--Refugees.
Spaniards--Foreign countries--History--20th century.
Harvard subject headings:
Spain--Civilization--20th century.
Spain--History--Civil War, 1936-1939--Refugees.
Spaniards--Foreign countries--History--20th century.
Princeton subject headings: