1. Helminths and protozoa of pigs on the Jos plateau, Nigeria: Occurrence, age, incidence and seasonal distribution;Ajayi;Bull. Anim. Health Prod. Afr.,1988
2. A dose-response investigation on the level of resistance to pyrantel citrate in nodular worms of pigs;Bjørn;Vet. Parasitol.,1989
3. Experimental cross-infection with gastrointestinal nematodes of sheep and cattle;Borgsteede;Parasitol. Res.,1981
4. Epidemiology of poly-parasitism I. Occurrence, frequency and distribution of multiple infections in rural communities in Chad Peru, Afghanistan and Zaire;Buck;Tropem. Parasit.,1978
5. The stimulation of resistance in sheep to Fasciola hepatica by infection with Cystecercus tenuicollis;Campbell;Int. J. Parasitol.,1977