00403nam a22001697a 4500020001500000082001300015100001400028245003700042250001200079260003500091300001000126650002300136654002300159700001400182700001900196700001800215 a0727911023 a613bCOG aCoggon, D aEpidemiology for the uninitiated a4th ed. aUKbBMJ Publishinh Housec2000 a69 p. aCommunity Medicine aCommunity Medicine aCoggon, D aRose, Geoffrey aBarker, D J P