00304nam a2200121Ia 4500008004100000100003400041245003000075260003100105300001000136650001200146942000700158999001700165190216s9999||||xx |||||||||||||| ||und||  aSingh. S.P & Agarwal. J.P 0aOptics And Atomic Physics  bPragathi   Prakashanc1970  a763 p  aPhysics  cBK  c33457d33457