00311nam a2200133Ia 4500008004100000020001500041041001200056082001100068100001300079245002900092260003600121300000800157650001200165221030s9999    xx            000 0 und d  a8121904692  aEnglish  a105.23  aH. Singh 0aB. Sc. Practical Physics  bS. Chand & Co.aNew Delhic2004  a498  aPhysics