00425nam a2200133Ia 4500020001800000082002000018100001300038245005400051250000900105260003900114300001700153504003700170650008400207  a9788190607940  a614.44bPAR218  aPark, K. 0aPark's Textbook of Preventive and Social Medicine  a20th  aIndiabM/s Banarsidas Bhanotc2009  a832p.c30 cm  aincluded index and bibliography   aCommunity medicine.vPublic health. vMedicine, PreventivevEpidemiology vIMDC