00273nam a2200121Ia 4500008004100000100001200041245002500053260002800078300000900106650001200115942000700127999001700134190216s9999||||xx |||||||||||||| ||und||  aEfy Pub 0aElectronics Projects  bEfy Pub New Delhic1997  a125p  aPhysics  cBK  c32939d32939