00323nam a2200133Ia 45000030006000000080041000060400015000471000032000622450046000942500011001402600009001515460012001600050017001720STCL150530s9999    xx            000 0 und d  aSTCLcSTCL  aMittal, S.C.; Aharwal, D.C.  aDifferential geometry of three dimensions  aFourth  c1969  aEnglish20220125170015.0