000 00318nam a2200121Ia 4500
008 190812s9999 xx 000 0 und d
020 _a9780070228399
100 _aLeon- Garcia
245 0 _aCommunication networks: Fundamental concepts and key architecture
260 _bTata Mcgrawhill
365 _b150
942 _cDB
999 _c6418
_d6418