00321nam a2200133Ia 45000030006000000080041000060400015000471000020000622450045000822500010001272600021001375460012001580050017001700STCL150530s9999    xx            000 0 und d  aSTCLcSTCL  aShanmugam, K.S.  aDigital and analog communication systems  aFirst  bJohn Wileyc1966  aEnglish20220125170210.0