1. Barki, V. H., Nath, H., Hart, E. B. and Elvenjem, C. A.Proc. Soc. Exp. Biol. Med., 1947,66, 474.
2. Burr, G. O. and Burr, M. M.Jour. Biol. Chem., 1929,82, 345.
3. ————— Ibid., 1930,86, 587.
4. Decker, A. B., Fillerup, D. L. and Mead, J. F.Jour. of Nut., 1950,41, 507.
5. Follis, R. H...The Pathology of Nutritional Disease, Charles C. Thomas. Publisher Benner Store House, Illinois, 1948.