Gerben Sonderman 1908-1955 : testpiloot van Fokker, verzetsman, vlieger van de Prins / door Th.J. de Jongh Spitfire : A Test Pilot's Story Designers and test pilots society of experimental test pilots : history of the first 20 years Testpilot Testing years flight testing of production aircraft Luftwaffe test pilot : Flying captured Allied Aircraft of World War 2