00270nam a2200121Ia 4500100001800000650001200018654001200030245003600042260003700078082001300115300000800128546001200136  aTheraja/B.L.   aPhysics  aPhysics  aTextbook of Engineering Physics  bS.Chand and Co.aNew Delhic1984  a530bTHE  a776  aENGLISH