00290nam a2200121Ia 4500008004100000100002700041245002400068260003100092300000900123650001200132942000700144999001700151190216s9999||||xx |||||||||||||| ||und||  aGupta S L And Kumar  V 0aClassical Mechanics  bPragathi   Prakashanc1990  a440p  aPhysics  cBK  c33270d33270