00321nam a2200145Ia 45000030006000000080041000060400015000471000015000622450017000772500006000942600040001003000006001405460012001460050017001580STCL150530s9999    xx            000 0 und d  aSTCLcSTCL  aVittal P R  aTrigonometry  a3  bMargham Publication ; Chennaic2004  a0  aEnglish20220125170008.0