00320nam a2200133Ia 45000030006000000080041000060400015000471000016000622450060000782500010001382600009001485460012001570050017001690STCL150530s9999    xx            000 0 und d  aSTCLcSTCL  aZwikker, C.  aAdvanced geometry of plane curves and their application  aFirst  c1963  aEnglish20220125170016.0