00397nam a22001577a 4500020001600000082001300016100001300029245005600042250001200098260004000110300001100150650002300161654002300184700001300207700001900220  a81761910101  a613bDAS  aDas, B C  aTextbook of community medicine with recent advances  a1st ed.  aNew DelhibAhuja Book Companyc2003  a386 p.  aCommunity Medicine  aCommunity Medicine  aDas, B C  aMalini, Shobha