00322nam a2200133Ia 45000030006000000080041000060400015000471000018000622450059000802500011001392600009001505460012001590050017001710STCL150530s9999    xx            000 0 und d  aSTCLcSTCL  aWobster, A.G.  aPartial differential equations of mathematical physics  aSecond  c1955  aEnglish20220125165943.0