Magnetic sound recording : theory and practice of recording and reproduction / D.A. Snel. Snel, D. A. Amplifiers (Electronics) Magnetic recorders and recording. Microphone. Sound Equipment and supplies. Stereophonic sound systems. Sound recordings. 621.3818 SNM Originally published as Magnetische Geluidsregistratie. Eindhoven : Philips, c1963. c1963. 1963 Text 217p. : eng Philips technical library