00315nam a2200133Ia 45000030006000000080041000060400015000471000018000622450039000802500011001192600022001305460012001520050017001640STCL150530s9999    xx            000 0 und d  aSTCLcSTCL  aHouston, W.V.  aPrinciples of mathematical physics  aSecond  bMcgraw hillc1948  aEnglish20220125170121.0