Motor-uniselectors with noble-metal contacts in telephone switching systems /
Krause, Richard.
Brinkmann, Karl-Heinz.
Hesketh, J. F.
New York London Van Nostrand
1970
Originally published as 'Edelmetall-Moto-Drehwähler in der Fernsprechvermittlungstechnik'. 2nd ed. München: Oldenbourg, 1970
bibl p193-198
Telephone, Automatic.