1. A survey of egg quality at two egg-laying tests;Brant;U.S.D.A. Tech. Bull,1953
2. Recommended standards for scoring and measuring opened egg quality;Brant;Food Tech.,1951
3. Breed variations in egg characters;Hall;Poultry Sci.,1939
4. The Haugh unit for measuring egg quality;Haugh;U. S. Egg Poultry Mag,1937
5. An easy method for finding Haugh units of interior egg quality;Haugh;U. S. Egg Poultry Mag.,1937