1. The vitamin A requirements of White Leghorn pullets during the growing period;Bearse;Poul. Sci.,1937
2. The fat soluble vitamin content of hens' egg yolk as affected by the ration and management of the layers;Bethke;Jr. Biol. Chem.,1927
3. The vitamin A and D activity of egg yolks of different color concentrations;Bisbey;Mo. Agr. Exp. Sta. Bul.,1934
4. The vitamin D requirements of chickens;Carver;Wash. Agr. Exp. Sta. Bul.,1934
5. The vitamin A content of eggs produced by chickens fed viosterol and various percentages of cod liver oil;DeVaney;Jr. Agr. Res.,1935