000 00311nam a2200121Ia 4500
100 _aJennings,Fred
020 _a0-632-01306-0
942 _cBK
245 _aPractical data communications modems, networks& protocols
260 _aBlackwell Scientific, London
_c1986
082 _a001.6425 Jen
300 _axv;243
999 _c21541
_d21541