Columbia subject headings:
Germany. Luftwaffe. Legión Cóndor.
Spain--History--Civil War, 1936-1939--Aerial operations, German.
Spain--History--Civil War, 1936-1939--Participation, German.
Harvard subject headings:
Air pilots, Military--Spain--Biography.
Germany. Luftwaffe. Legión Cóndor.
Spain--History--Civil War, 1936-1939--Aerial operations, German.
Spain--History--Civil War, 1936-1939--Participation, German.
Princeton subject headings:
Germany. Luftwaffe. Legión Cóndor
Spain--History--Civil War, 1936-1939--Aerial operations, German.
Spain--History--Civil War, 1936-1939--Participation, German.