000 00346nam a2200145Ia 4500
008 221231s9999 xx 000 0 und d
100 _aSingh R P and Sapre S D
_95591
245 0 _aCommunication System  
250 _a2
260 _bTata McGraw-Hill
260 _c2008
300 _a584
650 _aTelecommunication
_95592
942 _cBE_BK
999 _c4101
_d4101