00319nam a2200133Ia 45000030006000000080041000060400015000471000016000622450058000782500011001362600009001475460012001560050017001680STCL150530s9999    xx            000 0 und d  aSTCLcSTCL  aBrahma Nand  aSperical harmonics and partial differential equations  aSecond  c1964  aEnglish20220125165946.0