00313nam a2200133Ia 45000030006000000080041000060400015000471000018000622450039000802500011001192600020001305460012001500050017001620STCL150530s9999    xx            000 0 und d  aSTCLcSTCL  aForsyth, A.R.  aTreatise on differential equations  aFourth  bMacmillanc1956  aEnglish20220125170127.0