1. SAS User's Guide;Barr,1979
2. The effect of phosphorus on egg specific gravity and other production parameters;Bletner;Poultry Sci.,1975
3. The relationship of dietary phosphorus to eggshell quality;Damron;Poultry Sci.,1974
4. Phosphorus requirement of six strains of caged laying hens;Edwards;Poultry Sci.,1981
5. Effects of short term phosphorus deprivation on laying hens;Garlich;Poultry Sci.,1975