00273nam a2200109Ia 4500008004100000082001400041100001700055245003300072250000800105260002700113650002300140150201s1997    xx            000 0 und d  a614bO97D  aDETELS,ROGER  aOXFORD TB OF PUBLIC HEALTH-I  a3RD  bOXFORDaNEW YORKc1997  aCOMMUNITY MEDICINE