References
- Tyler , C. and Geake , F. H. 1963 . A study of various impact and crushing methods used for measuring shell strength. . Brit. Poultry Sci. , 4 : 49 – 61 .
- Tyler , C. and Geake , F. H. 1964a . Egg shell strength and its relationship to thickness, with particular reference to individuality in the domestic hen. . Brit. Poultry Sci. , 5 : 3 – 18 .
- Tyler , C. and Geake , F. H. 1964b . The testing of methods for cracking egg shells, based on paired readings from individual eggs and the measurement of some effects of various treatments. . Brit. Poultry Sci. , 5 : 19 – 28 .