magnetron / by R. Latham, A.H. King and L. Rushforth Encyclopedic dictionary of electronics and nuclear engineering / by Robert I. Sarbacher c.i.b.s. lighting guide Museums and art galleries / The Chartered Institution of Building Services (Lighting Division), London b.r. Naval marine engineering practice / Ship Department, Admiralty rapport physisch laboratorium tno Beknopt overzicht van enkele West-Europese wapensystemen in gebruik, ontwikkeling of studie / door S. Gratema Technical and specialised periodicals published in Britain