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 . 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 .
- Tyler , C. and Geake , F. H. 1964b . The testing of methods for crushing egg shells, based on paired readings from individual eggs and the measurement of some effects of various treatments. . Brit. Poultry Sci. , 5 : 29 – 35 .