00295nam a2200109Ia 4500008004100000041000800041082002700049100001600076245004700092260003700139300000900176230411s9999    xx            000 0 und d  aeng  aCH/610.7343/VID/B01571  aVidya ratan  aHandbook of Preventive and Social Medicine  bJaypee BrothersaNew Delhic1994  a376p