00277nam a2200121Ia 45000030006000000080041000060400015000471000021000622450021000832600022001045460012001260050017001380STCL150530s9999    xx            000 0 und d  aSTCLcSTCL  aAlvin Hansen, H.  aGuide to keyness  bMcgraw hillc1953  aEnglish20220125165716.0