title: Seasonal variation of carotene and vitamin A in butter-fat and in serum.
authors.affiliation: Research Department, Messrs J. Bibby and Sons, Ltd., Liverpool.
authors.forename: J W
authors.initials: JW
authors.lastname: Lord
mesh_terms: D001769:Blood; D002079:Butter; D002338:Carotenoids; D006801:Humans; D012621:Seasons; D014801:Vitamin A; D014815:Vitamins
chemical_list: D014815:Vitamins; D014801:Vitamin A; D002338:Carotenoids; D002079:Butter