Van Berkel's patent de Luchtvaartafdeling: van Weegschaal tot Vliegtuig Alle Hens van 320 Squadron Regina et Patria Face of Courage : Eric Kennington, Portraiture and The Second World War dutch profile P-51D/K Mustang Photo File ML-KNIL RNEIAAF Through my Viewfinder role of European Ground and Air Forces after the Cold War Air Enthusiast Forty Air enthusiast forty-one flying book : the aviation world who's who and industrial directory Aircraft of the National Air and Space Museum Alles over de nieuwste straaljagers Fantastic flying machines