1 ELEKTROTEHNIČAR Elektrotehničar : časopis za elektro-radio, TV i kino-tehniku Zagreb : Tehnička knjiga, 1948 05 ELEKTROTEHNIČAR
2 MANLEY, David The Vacuum Tube Logic Book / Edited and compiled by David Manley. -a1st ed Campbell CA : Blue Book Enterprises Inc., 1994. - 621 MANLE vac
3 SOUND practices Sound Practices : A journal of audio technology Alexandria VA : Sound Practices, 1992 05 SOUND pr