Laboratory diagnosis in neonatal claf and pig diarrhoea : proceedings of a Workshop on Diagnostic Techniques for Enteropathogenic Agents Associated with Neonatal Diarrhoea in Calves and Pigs, held at the Central Veterinary Institute, Department of Virology, Lelystad, The Netherlands, June 3-5, 1980 - Guinee, P. A. M.; Leeuw, P. W. de (Current topics in veterinary medicine and animal science, 1981)