1. The Biology of Animal Viruses;Fenner,1974
2. Animal Diseases in South Africa;Henning,1956
3. Mettam, R.W.M. (1923) Ninth and Tenth Reports of the Director of Veterinary Education and Research, Union of South Africa, p 395
4. A microtitre technique for the assay of malignant catarrhal fever virus and neutralising antibody
5. Mtisiii, E.Z., Rossiter, P. B., Karstad, L. & Jessett, D.M. (1980) Journal of Hygiene, Cambridge, in press