BakerR. C., and CurtissR., “Strain Differences in Egg Shell Mottling, Internal Quality, Shell Thickness, Specific Gravity, and the Interrelationships between These Factors,”Poultry Science”, 37: 1086–1090 (1958).
2.
TylerC., and GeakeF. H., “Studies on Egg Shells: XV. Critical Appraisal of Various Methods of Assessing Shell Thickness,”Journal of the Science of Food and Agriculture, 12: 281–289 (1961).
3.
TylerC., and GeakeF. H., “Studies on Egg Shells: XIII. Influence of Individuality, Breed, Season and Age on Certain Characteristics of Egg Shells,”Journal of the Science of Food and Agriculture, 11: 535–547 (1960).
4.
WellsR. G., “The Measurement of Certain Egg Quality Characteristics: A Review,” in CarterT. C., ea., Egg Quality: A Study of the Hen's Egg(Oliver & Boyd, Edinburgh, 1968).
5.
WellsR. G., “Egg-Shell Strength: 1. The Relationship between Egg Breakage in the Field and Certain Laboratory Assessments of Shell Strength,”British Poultry Science, 8: 131–139 (1967).
