1. A comparison of two methods of supplying calcium to laying pullets;Berg;Washington Agri. Exp. Sta. Bull. No. 458,1944
2. Cornell Bulletin No. 858, 1950. Marketing practice and egg quality, 1948-49.
3. A survey of farm egg quality;Johnson;Sci. Agri.,1948
4. Changes in egg quality from producer to consumer;Larzelere;Poultry Sci.,1951
5. Consumers tell what kind of eggs they want;Stadelman;U. S. Egg and Poultry Magazine,1950