000 00267nam a2200121Ia 4500
100 _aGILL WATERS
365 _cRS
365 _d1
942 _cENGBK
245 _acomputer communication networks
260 _bMcGraw-hill Book co,
_c1992
_aLONDON
300 _aXXVII+375
999 _c34930
_d34930