000 00275nam a2200109Ia 4500
008 190912s9999||||xx |||||||||||||| ||und||
100 _aTravis Russell
245 0 _aTelecommunications Pocket Reference
260 _aUSA
_bTata McGraw Hill
_c2000
300 _a366
942 _cBK
999 _c7477
_d7477