00328nam a2200133Ia 4500008004100000020001500041041001200056082001600068100001400084245004500098260003100143300000800174650001200182221030s9999    xx            000 0 und d  a8126100524  aEnglish  a105.23bRaj  aM. G. Raj 0aProblems in Optics & soundcby M. G. Raj  bAnmol PubaNew Delhic1998  a215  aPhysics