00317nam a2200109Ia 4500008004100000082001500041100002300056245003200079260003300111630001800144650004500162211109s9999||||xx |||||||||||||| ||und||  a500bITT-F  aIttiyavirah, Sadhu 0aFor Our Scientific Progress  bNATIONAL BOOKSTALLaKottayam  xGENERAL STACK  aNATURAL SCIENCE & MATHAMATICSvGeneralia