00309nam a2200121Ia 45000030006000000080041000060400015000471000018000622450058000802600020001385460012001580050017001700STCL150530s9999    xx            000 0 und d  aSTCLcSTCL  aSmith Charles  aConic sections by the methods of co ordinate geometry  bMacmillanc1962  aEnglish20220125170016.0