000 00325nam a2200121Ia 4500
008 230222s9999 xx 000 0 und d
082 _a621.3821
100 _aAlberto Leon-Gracia
245 0 _aCommunication Networks fundamental concepts and key architectures
250 _a2
260 _bTata Mcgraw Hill
_c2004
942 _cBK
999 _c4649
_d4649