Telecommunications primer /
Langley, Graham.
Telecommunications primer / [Book]. Graham Langley. - 2nd ed. - London : Pitman, 1986. - vi,170p. : ill., maps ; 25cm.
Previous ed.: 1983. Includes index.
0273024787
Telecommunication systems.
Telecommunication systems
Telecommunications primer / [Book]. Graham Langley. - 2nd ed. - London : Pitman, 1986. - vi,170p. : ill., maps ; 25cm.
Previous ed.: 1983. Includes index.
0273024787
Telecommunication systems.
Telecommunication systems