00290nam a2200121Ia 45000030006000000080041000060400015000471000018000622450039000802600020001195460012001390050017001510STCL150530s9999    xx            000 0 und d  aSTCLcSTCL  aForsyth, A.R.  aTreatise on differential equations  bMacmillanc1961  aEnglish20220125165942.0