1. Vitamin A requirement of chicks at moderately elevated temperatures;Ascarelli;Poultry Sci.,1963
2. The vitamin A requirement of White Leghorn pullets during the growing period;Bearse;Poultry Sci.,1937
3. Growth and vitamin A liver storage of pullet chicks as related to ambient temperature and season of hatch;Kurnick;Poultry Sci.,1961
4. LeClerg, E. L., 1957. Mean Separation by the Functional Analysis of Variance and Multiple Comparisons, Agricultural Research Service. United States Department of Agriculture, AR-20-3.
5. Macro-and micro-methods for the determinations of serum vitamin A using triflouroacetic acid;Neeld;J. Nut.,1963