Jolley, Ernest Harris.
Introduction to telephony and telegraphy [by] E. H. Jolley. - London, Pitman, 1968. - x, 413 p. illus. 26 cm.
0273433709
73410047
B69-11623
Telephone.
Telegraph.
TK6161 / .J56 1968
Introduction to telephony and telegraphy [by] E. H. Jolley. - London, Pitman, 1968. - x, 413 p. illus. 26 cm.
0273433709
73410047
B69-11623
Telephone.
Telegraph.
TK6161 / .J56 1968