References
- Laing , J. A. 1955 . Fertility and Infertility In Domestic Animals , London : Bailliere, Tindall and Cox .
- McClure , T. J. 1975 . Nutritional and Metabolic Infertility of Grazing Cattle . Univ. Syd. Postgrad Comm. Vet. Sci. Proc. , 26 : 1 – 24 .