00287nam a2200121Ia 45000030006000000080041000060400015000471000030000622450035000922600009001275460012001360050017001480STCL150530s9999    xx            000 0 und d  aSTCLcSTCL  aIndu prakash; Ram Krishna  aText book of practical physics  c1958  aEnglish20220125170116.0