00298nam a2200121Ia 4500008004100000082000800041082001000049100001800059100002000077245001200097260005800109260000900167230118s9999||||xx |||||||||||||| ||und||  a530  bKUM/P  aarvindbkumar  bt.vramakrishnan 0aphysics  bnational council of educational research and training  c1988