1. Ackerson, C. W., M. J. Blish and F. E. Mussehl, 1936. The effect of variation in the Ca-P ratio on the utilization of nitrogen, calcium and phosphorus by the growing chick. Nebraska Agr. Exp. Sta. Res. Bull. No. 83.
2. Ackerson, C. W., M. J. Blish and F. E. Mussehl, 1938. The utilization of food elements by growing chicks. Nebraska Agr. Exp. Sta. Res. Bull. No. 87.
3. Effect of percentage of protein on growth and feed utilization of male chicks;Hammond;J. Agr. Res.,1938
4. Variation in growth of experimental birds;Hill;Poultry Sci.,1944
5. Antibiotics feed consumption and protein metabolism;Hohls;Poultry Sci.,1955