00274nam a2200145Ia 4500100001400000650001200014250000600026366000700032654001200039245002500051260002300076082000800099300000900107546001200116  aDass/H.K   aPhysics  a8  f20  aphysics  aMathematical Physics  bS.Chand & coc2018  bDAS  a1416  aENGLISH