Vitamin A in mixed feeds, premixes, and foods: collaborative study.
D000821:Animal Feed / Q000032:analysis*; D001628:Beverages / Q000032:analysis; D002338:Carotenoids / Q000032:analysis; D002523:Edible Grain / Q000032:analysis; D005504:Food Analysis; D008722:Methods; D014801:Vitamin A / Q000032:analysis*
D014801:Vitamin A; D002338:Carotenoids