00307nam a2200121Ia 45000030006000000080041000060400015000471000029000622450042000912600023001335460012001560050017001680STCL150530s9999    xx            000 0 und d  aSTCLcSTCL  aHilbert, D.; Courant, R.  aMethods of mathematical physics vol I  bIntersciencec1965  aEnglish20220125170024.0