1. Development of feather keratin during embryogenesis of the chick.;Bell;J. Cellular Biol.,1963
2. Binkley, C. H., and O. R. Vasak, 1950. Production of a friable meal from feathers. U. S. Dept. Agric., Agric. Res. Service Bull. No. AIC-274
3. The Amino Acid Composition of Proteins and Foods;Block,1951
4. The development of an amino acid reference diet for the early growth of chicks.;Dean;Poultry Sci.,1965
5. L'incorporation d'acides amines marques dans le poil du corbaye.;De Bersaques;Arch. Beiges Dermatol. Syphiligraph.,1962