Bellamy, John C.
Digital telephony - New Delhi John Wiley & Sons 2000 - xxv,643 p. 22.6cm
9788126509294
Digital telephone systems
621.385 / BEL
Digital telephony - New Delhi John Wiley & Sons 2000 - xxv,643 p. 22.6cm
9788126509294
Digital telephone systems
621.385 / BEL