000 00344nam a2200121Ia 4500
008 220217s9999||||xx |||||||||||||| ||und||
082 _a621.382 SAP
100 _aSapre, S.D Singh, S.P
245 0 _aCommunication system: analog and digital
260 _aTata mcgraw hill
_bNew Delhi
_c2000
300 _b0
650 _aCOMMUNICATION SYSTEM
999 _c167885
_d167885