00309nam a2200133Ia 45000030006000000080041000060400015000471000032000622450026000942500010001202600016001305460012001460050017001580STCL150530s9999    xx            000 0 und d  aSTCLcSTCL  aSubrahmanyam, N.; Briji lal  aWaves and oscillation  aFifth  bVikasc1982  aEnglish20220125170141.0