00311nam a2200109Ia 4500008004100000041000800041082003100049100002800080245004700108260003700155300000900192230411s9999    xx            000 0 und d  aeng  aCH/610.7343/GUP/MAH/B07350  aGupta M C & Mahajan B K  aTextbook of Preventive and Social Medicine  bJaypee BrothersaNew Delhic2003  a646p