000 00275nam a2200109Ia 4500
008 190912s9999||||xx |||||||||||||| ||und||
100 _aRaymond R.
245 0 _aBusiness Data Communications and Networking
260 _aAmerica
_bMcGraw-Hill
_c1999
300 _a464
942 _cBK
999 _c7439
_d7439