1. The epidemiology of helminth disease in farm animals;Armour;Veterinary Parasitology,1980
2. Anais do I Seminario Nacional sobre parasitoses dos Bovinos;Beck,1979
3. Seasonal transmission of bovine gastro-intestinal nematodes in the Texas Gulf Coast;Craig;Journal of American Veterinary Medical Association,1979
4. Parasites of domestic and wild animals in South Africa;Horak;Onderstepoort Journal of Veterinary Research,1978
5. The differentiation of the infective larvae of some common nematode parasites of cattle;Keith;Australian Journal of Zoology,1953