00277nam a2200121Ia 45000030006000000080041000060400015000471000018000622450037000802600009001175460012001260050017001380STCL150530s9999    xx            000 0 und d  aSTCLcSTCL  aPersonnel, N.  aBasic machines and how they work  c1971  aEnglish20220125170110.0