00300nam a2200121Ia 45000030006000000080041000060400015000471000018000622450047000802600022001275460012001490050017001610STCL150530s9999    xx            000 0 und d  aSTCLcSTCL  aChurchill, V.  aFourier series and boundary value problems  bMcgraw hillc1941  aEnglish20220125165956.0