Variable resistors and potentiometers / Dummer, G. W. A. (Geoffrey William Arnold) Electric resistors. Potentiometer. TK6565.R426 D8 621.38151 DUV Includes bibliography and index. London, Pitman ]1956] ]1956] 1956 Text 176 p. eng His Radio and electronic components, v. 2 Dummer, G. W. A. (Geoffrey William Arnold). Radio and electronic components, v. 2.