00289nam a2200133Ia 45000030006000000080041000060400015000471000018000622450027000802500010001072600009001175460012001260050017001380STCL150530s9999    xx            000 0 und d  aSTCLcSTCL  aMoulton, F.R.  aDifferential equations  aThird  c1958  aEnglish20220125165947.0