00316nam a2200133Ia 45000030006000000080041000060400015000471000027000622450045000892500010001342600009001445460012001530050017001650STCL150530s9999    xx            000 0 und d  aSTCLcSTCL  aHaas, K.B.; Packer, Q.  aPreparation and use of audio visual aids  aThird  c1964  aEnglish20220125170326.0