00335nam a2200133Ia 45000030006000000080041000060400015000471000029000622450047000912500010001382600024001485460012001720050017001840STCL150530s9999    xx            000 0 und d  aSTCLcSTCL  aCourant, R.; Hilbert, D.  aMethods of the mathematical physics vol II  aFirst  bWiley Easternc1975  aEnglish20220125165946.0