1. Byerly, T. C. 1941. Feed and other costs of producing market eggs. Technical Bulletin A-1. Maryland Agric. Exp. Sta., College Park, MD.
2. Amino acid requirements of broilers and laying hens;Combs,1968
3. Multiple linear regression equations for the prediction of food intake in the laying fowl;Leeson;Br. Poult. Sci.,1973
4. A prediction equation to predict food and energy intake of laying hens;Gous,1978
5. Prediction of feed intake by laying hens;Byerly,1979