title: Epidemiological studies on the 1967-68 foot and mouth epidemic: attack rates and cattle density.
mesh_terms: D000818:Animals; D002417:Cattle; D002418:Cattle Diseases / Q000453:epidemiology*; D004196:Disease Outbreaks; D004739:England; D005536:Foot-and-Mouth Disease / Q000453:epidemiology*; D011156:Population Density; D014852:Wales