1. Anderson, J. O. 1958. Personal communication.
2. Energy level of the diet for laying hens in western Washington;Berg;Washington Agric. Exp. Sta. Tech. Bull.,1956
3. The digestibility of the carbohydrate complex by birds of different ages;Bolton;J. Agr. Sci.,1955
4. Multiple range and multiple F tests;Duncan;Biometrics,1955
5. Composition and productive energy of poultry feeds and rations;Fraps;Texas Agr. Exp. Sta. Bull.,1946