1. An introduction to Avermectin;Campbell;New Zealand Veterinary Journal,1981
2. Numerical interpolation, differentiation and integration;Davis,1964
3. Methods for evaluating anthelmintics in the laboratory and their application to field conditions;Egerton,1963
4. A statistical method for comparing worm burdens in two groups of sheep, Onderstepoort;Groeneveld;Journal of Veterinary Research,1969
5. The logarithm in biology, 1. Mechanisms generating the log-normal distribution exactly;Koch;Journal of Theoretical Biology,1966