Telecommunications primer /
Langley, Graham.
Telecommunications primer / [Book]. Graham Langley. - 3rd ed. - London : Pitman, 1990. - vi, 182p. : ill. ; 25 cm.
Includes index.
0273031872 (pbk)
Telecommunication systems.
Telecommunications primer / [Book]. Graham Langley. - 3rd ed. - London : Pitman, 1990. - vi, 182p. : ill. ; 25 cm.
Includes index.
0273031872 (pbk)
Telecommunication systems.