00284nam a2200121Ia 4500008004100000100002300041245002300064260003000087300000900117650001200126942000700138999001700145190216s9999||||xx |||||||||||||| ||und||  aGopalakrishnan N S 0aBoudhiga Koudhugam  bPrabhath Book Housec1993  a545p  aPhysics  cBK  c33282d33282