00267nam a2200121Ia 45000030006000000080041000060400015000471000018000622450014000802600022000945460012001160050017001280STCL150530s9999    xx            000 0 und d  aSTCLcSTCL  aBeranek, L.L.  aAcoustics  bMcgraw hillc1954  aEnglish20220125170143.0