1. National Research Council 1960. Recommended nutrient requirements for poultry. National Research Council, Washington 25, D. C.
2. On the phosphorus requirements of laying hens;Pepper;Poultry Sci.,1958
3. Statistical Methods Applied to Experiments in Agriculture and Biology.;Snedecor,1953
4. Results of low phosphorus and lack of unidentified factors in the diets of turkey breeder hens;Wilcox;Poultry Sci.,1957
5. Evidence for a water-soluble growth promoting factor (s) in soybean oil meal;Wilcox;Poultry Sci.,1961