000 00284nam a2200133Ia 4500
654 _aELN
100 _aOreilly.J.J.
250 _a2nd Ed.
245 _aTelecommunication Principles.
260 _bVNRL
_c1989
082 _bORE
_a621.38
300 _aVII, 158p.
999 _c13581
_d13581
300 _c21 cm.
655 _aF-01
041 _aeng
546 _aText in English