000 00224nam a2200097Ia 4500
020 _a053495054X
100 _aWILLIAM.A, SHAY
245 _aUNDERSTANDING DATACOMMUNICATIONS & NERWORKS
260 _aND
_b VIKAS
_c1998
942 _cBK
999 _c7490
_d7490