000 00272nam a2200109Ia 4500
008 160930s9999 xx 000 0 und d
100 _aRamabhadran,S.
245 _aTelecommunications
260 _aDelhi
_bKhanna Publishers
_c1973
300 _axxviii,841p.;24cm
942 _cDB
999 _c9308
_d9308