1. Official Methods of Analysis,1975
2. Experimental Design;Cochran,1957
3. Dietary energy and fat content as factors in the nutrition of developing egg strain pullets and young hens;Cunningham;1. Effect on several parameters and body composition at sexual maturity. Poultry Sci.,1976
4. Multiple range and multiple F tests;Duncan;Biometrics,1955
5. SAS for linear models;Freund,1981