References
- Foster , W. H. 1967 . The relative importance of traits reported in the first three Gosford Random Sample Tests . Br. Poult. Sci. , 8 : 201 – 207 .
- Hann , C. M. 1968 . Quarterly Journal, Abstracts Section , : 32 NAAS, Poultry Section.
- Ministry of Agriculture for Northern Ireland (1966). Fourth Random Sample Laying Test (Commercial Stock) 1965–66.
- Ministry of Agriculture for Northern Ireland (1967). Fifth Random Sample Laying Test (Commercial Stock) 1966–67.
- Snedecor , G. W. and Cochran , W. G. 1967 . Statistical Methods, , 6th ed. , 412 – 414 . Ames : Iowa State College Press .