00330nam a2200133Ia 45000030006000000080041000060400015000471000029000622450043000912500010001342600023001445460012001670050017001790STCL150530s9999    xx            000 0 und d  aSTCLcSTCL  aCourant, R.; Hilbert, D.  aMethods of mathematical physics vol II  aFirst  bIntersciencec1966  aEnglish20220125170127.0