1. Brambell, M. R.: Variation in counts of Haemonchus contortus eggs in the faeces of housed sheep. J. Helminth. 37, 1–10 (1963).
2. Brouwer, E.: Numerical data on respiration and balance trials with cows. Cyclostyled, Wageningen 1962.
3. Ewer, T. K., and D. P. Sinclair: Internal parasites in Canterbury sheep. N. Z. J. Sci. Technol. A 32, 35–48 (1951).
4. Gibson, T. E.: Examination of faeces for helminth eggs and larvae. Vet. Bull. (Weybridge) 35, 403–410 (1965).
5. Gordon, H. Mcl: In: Riek et al. 1958.