00295nam a2200133Ia 45000030006000000080041000060400015000471000017000622450024000792500011001032600018001145460012001320050017001440STCL150530s9999    xx            000 0 und d  aSTCLcSTCL  aHarnam Singh  aPrinciples of Light  aSecond  bS.Chandc1974  aEnglish20220125170144.0