brochures Variabele dienstplicht? : mogelijkheden en problemen / red. R.W. van Dijk ; [m.m.v. R.E. Hulselmans ... et al.] Urquhart of Arnhem : the life of Major General R.E. Urquhart, CB, DSO / by John Baynes agardograph Aerodynamic interference induced by reaction controls / by F.W. Spaid and L.A. Cassel ; Edited by R.E. Wilson
