1. Available amino adds in poultry feedstuffs;Anderson;Feedstuffs,1969
2. Variability of cholesterol concentration in plasma and egg yolks of hens and evaluation of the effect of some dietary oils;Bartov;Poultry Sci.,1971
3. Bornstein, S., 1970. Protein requirements and phase feeding of laying hens under subtropical conditions. 14th Wld's Poultry Congr., Madrid, pp. 651-657.
4. Multiple range and multiple F tests;Duncan;Biometrics,1955
5. Feedstuffs analysis table;Hubbell;Feedstuffs,1971