1. Supplementary values of animal protein concentrates in chick rations;Almquist;J. Nutrition,1935
2. Anonymous, 1950. Official Methods of Analysis–Kjeldahl, Wilfarth, Gunning. Association of Official Agricultural Chemist, Seventh Edition, Washington 4, D.C., p. 13.
3. Amino Acid Handbook;Block,1956
4. Studies on the lysine requirement of chicks;Edwards;Poultry Sci.,1956
5. Experimental Design;Federer,1955