Principles of Telephony /
Biswas , Nripendra
Principles of Telephony / Nripendra Biswas - - New Delhi : UBS pub , c1988 . - vii , 138 p . : ill . ; 21cm .
Includes Index .
81-85273-09-X
1 . Telephony .
2 . EEE .
621.385/ BIP
Principles of Telephony / Nripendra Biswas - - New Delhi : UBS pub , c1988 . - vii , 138 p . : ill . ; 21cm .
Includes Index .
81-85273-09-X
1 . Telephony .
2 . EEE .
621.385/ BIP