000 00303nam a2200157Ia 4500
100 _aKhanna, V K
080 _a621.38
526 _dTB
526 _aUG
366 _f20%
942 _cBK
245 _aDigital communication
260 _aS Chand
_bNew Delhi
_c2014
300 _axv,268
546 _aE
999 _c53064
_d53064