00283nam a2200121Ia 4500008004100000100003400041245002700075260001500102300000800117650001200125942000700137999001700144190216s9999||||xx |||||||||||||| ||und||  aSingh. S.P & Agarwal. J.P 0aPhysics Atomic Physics  bNullc1984  a619  aPhysics  cBK  c33077d33077