Columbia subject headings:
Political refugees--Spain--History--20th century.
Spain--History--Civil War, 1936-1939--Refugees.
Harvard subject headings:
Political refugees--Spain--History--20th century
Spain--History--Civil War, 1936-1939--Refugees
Princeton subject headings:
Political refugees--Spain--History--20th century.
Spain--History--Civil War, 1936-1939--Refugees.