00283nam a2200121Ia 45000030006000000080041000060400015000471000037000622450024000992600009001235460012001320050017001440STCL150530s9999    xx            000 0 und d  aSTCLcSTCL  aUnderwood, R.S.; Sparko Fred, W.  aAnalytical geometry  c1956  aEnglish20220125170017.0