00326nam a2200133Ia 45000030006000000080041000060400015000471000024000622450048000862500011001342600018001455460012001630050017001750STCL150530s9999    xx            000 0 und d  aSTCLcSTCL  aRavisinghania, M.O.  aOrdinary and partial differential equations  aFourth  bS.Chandc1991  aEnglish20220125165942.0