References
- Beatty , R.A. 1960 . Journal of Reproduction and Fertility , 1 : 52 – 52 .
- Beatty , R.A. , Bennett , G.H. , Hall , J.G. , Hancock , J.L. and Stewart , D.L. 1969 . Journal of Reproduction and Fertility , 19 : 491 – 491 .
- Dzuik , P.J. 1965 . Journal of Reproduction and Fertility , 10 : 389 – 389 .
- Hess , E.A. , Ludwick , T.M. , Rickard , H.E. and Fordyce , E. 1958 . Fertility and Sterility , 9 : 238 – 238 .
- MacMillan , K.L. 1970 . Australian Journal of Biological Science , 23 : 691 – 691 .
- Napier , R.A.M. 1961 . Journal of Reproduction and Fertility , 2 : 273 – 273 .
- Shannon , P. 1965a . Journal of Dairy Science , 48 : 85 – 85 .
- Shannon , P. 1965b . Journal of Dairy Science , 48 : 1357 – 1357 .
- Shannon , P. Proceedings of New Zealand Society of Animal Production . Vol. 28 , pp. 23 – 23 .