00275nam a2200121Ia 4500008004100000100001000041245003300051260002500084300000800109650001200117942000700129999001700136190216s9999||||xx |||||||||||||| ||und||  aGupta 0aAtomic And Molecular Physics  bPragathi   Prakashan  a303  aPhysics  cBK  c33998d33998