00282nam a2200121Ia 45000030006000000080041000060400015000471000021000622450039000832600009001225460012001310050017001430STCL150530s9999    xx            000 0 und d  aSTCLcSTCL  aGoursat Edouarel  aTreatise on differential equations  c1945  aEnglish20220125165942.0