00253nam a2200109Ia 4500100003200000250000600032654001200038245003500050260003800085300000800123546001200131  aRichtmyer/F.k/ Cooper/J.N.   a6  aPhysics  aIntroduction to Modern Physics  bTata McGraw HillaNew Delhic1991  a767  aENGLISH