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Bovine ostertagiasis : a review and annotated bibliography
by J. Armour and C. P. Ogbourne
Bok Språk ikke angitt 1982
Helminth diseases of cattle, sheep and horses in Europe : proceedings of workshop held at Veterinary School of University of Glasgow April 1973
edited by G.M. Urquhart and J. Armour
Bok Engelsk 1973