00294nam a2200133Ia 45000030006000000080041000060400015000471000015000622450035000772500010001122600009001225460012001310050017001430STCL150530s9999    xx            000 0 und d  aSTCLcSTCL  aJohn Fritz  aPartial differential equations  aThird  c1978  aEnglish20220125165946.0