"welch, s . "
signalling in telecommunications networks: / s.. welch - 1 ed. - uk : peter peregrinus 1979. - "ix, 385p.; 21 cm."
0 906048 46 x
TK6392 / .W37 1979
signalling in telecommunications networks: / s.. welch - 1 ed. - uk : peter peregrinus 1979. - "ix, 385p.; 21 cm."
0 906048 46 x
TK6392 / .W37 1979