title: The provitamin A requirement of laying hens.
authors.forename: M W
authors.initials: MW
authors.lastname: TAYLOR
authors.forename: W C
authors.initials: WC
authors.lastname: RUSSELL
mesh_terms: D000818:Animals; D002645:Chickens; D004531:Eggs; D005260:Female; D006801:Humans; D010058:Oviposition; D014801:Vitamin A; D014815:Vitamins
chemical_list: D014815:Vitamins; D014801:Vitamin A