1. A survey of egg quality at two egg laying tests;Brant;U.S.D.A. Tech. Bull.,1953
2. Brant, A. W., and H. L. Schrader, 1952. How to measure egg I.Q. (interior quality). P. A. 202, U.S.D.A.
3. Seasonal variations in egg quality;Grotts,1956
4. A comparison of the egg production of seven White Leghorn strains housed in two environments—floor pens and laying battery;Gowe;Poultry Sci.,1955
5. The Haugh unit for measuring egg quality;Haugh;U. S. Egg Poultry Magazine,1937