Principal poultry diseases diagnosed, North Central Poultry Disease Conference Area, 1969.
D000367:Age Factors; D000818:Animals; D002645:Chickens; D007255:Information Services; D010272:Parasitic Diseases / Q000453:epidemiology; D010273:Parasitic Diseases, Animal; D011201:Poultry Diseases / Q000453:epidemiology*; D009626:Terminology as Topic; D014422:Turkeys; D014481:United States