Richards, D.L.
Telecommunication by speech : the transmission performance of telephone networks - London Butterworths 1973 - 589 p.
Bibly: 529-577
621.395.4 / R5
Telecommunication by speech : the transmission performance of telephone networks - London Butterworths 1973 - 589 p.
Bibly: 529-577
621.395.4 / R5