Columbia subject headings:
Germans--Spain--History--20th century.
Spain--History--Civil War, 1936-1939--Participation, German.
Harvard subject headings:
Germans--Spain--History--20th century.
Spain--History--Civil War, 1936-1939--Participation, German.
Princeton subject headings:
Germans--Spain--History--20th century.
Spain--History--Civil War, 1936-1939--Participation, German.