1. Bearse, G. E., 1940. Unpublished data of Western Washington Experiment Station, Puyallup.
2. The effect of rutin and ascorbic acid and of alfalfa on blood and meat spots in hen's eggs;Carver;Poultry Sci.,1948
3. Observations on the incidence and characteristics of blood and meat spots in hens' eggs;Benton;Poultry Sci.,1947
4. Inheritance of meat and blood spots;Harper,1950
5. The yolk color index;Heiman;U. S. Egg and Poultry Magazine,1935