1. Norris, L. C., 1954a. Unidentified chick growth factors in distillers dried solubles. Proc. 9th Distillers Feed Conf., pp. 20-28.
2. Norris, L. C., 1954b. The'present status of unidentified vitamins. Proc. 7th California Animal Industry Conf., pp. 57-58.
3. Scott, M. L., L. C. Norris, L. S. Jensen, A. B. Morrison and P. E. Waibel, 1954. Unidentified factors required by poultry. Proc. 1954 Cornell Nutrition Conf., pp. 82-90.
4. Production of depleted chicks by feeding maternal diets deficient in unidentified growth factors;Waibel;Poultry Sci.,1955