handleiding Digitaal snelheidsmeten met de standaard telephone Doppler radar / [samenst.: W.B.G.M. Oude Vrielink] manual / artillery experimental board Measuring projectile velocities inside the barrel of the gun and after leaving the muzzle with the aid of Doppler radar / [samenst.: L. Fortuin ; … handleiding Doppler computer DORA" / lecture of major ir H.J. de Bruine
