World War One
NOWARRA, H.J. & BROWN, Kimbrough S.
von Richthofen and the Flying Circus
Harleyford Series
TREADWELL, Terry C.
Knights of the Black Cross - German Fighter Aces of the First World War
TREADWELL, Terry C. & WOOD, Alan C.
German Knights of the Air 1914 - 1918: The Holders of the Orden Pour le Mérite
Van WYNGARDEN, Greg
Early German Aces of World War 1
Osprey Aircraft of the Aces 73
Van WYNGARDEN, Greg
Jagdgeschwader Nr II - Geschwader 'Berthold'
Osprey Aviation Elite Units 19
