Introduction to telephony and telegraphy
Jolley, Ernest Harris.
Introduction to telephony and telegraphy [by] E. H. Jolley. - London, Pitman, 1994. - x, 413 p. illus. 24 cm.
Includes bibliography and index.
8185614369
Telephone.
Telegraph.
621.38 / JOI
Introduction to telephony and telegraphy [by] E. H. Jolley. - London, Pitman, 1994. - x, 413 p. illus. 24 cm.
Includes bibliography and index.
8185614369
Telephone.
Telegraph.
621.38 / JOI