00337nam a2200133Ia 4500008004100000020001800041100002600059245004700085250001100132260002100143260000900164300000800173650002200181221231s9999    xx            000 0 und d  a0-195-68622-5  aSingh R.P., Sapre S.D 0aCommunication Systems : Analog and Digital  a2nd Ed  bTata McGraw-Hill  c2008  a584  aTelecommunication