00285nam a2200121Ia 4500008004100000100001500041245002300056260004000079300000800119650001200127942000700139999001700146190216s9999||||xx |||||||||||||| ||und||  aPrabhu N Y 0aEngineering Metals  bPune Vidyatrhi Griha Prakasanc1990  a97p  aPhysics  cBK  c33331d33331