Okoh A. Enzootic abortion of ewes in Nigeria : an investigation into the naturally occurring disease in a research animal facility. Rev. Elev. Med. Vet. Pays Trop. [Internet]. 1986 Feb. 1 [cited 2024 Nov. 3];39(2):181-4. Available from: https://revues.cirad.fr/index.php/REMVT/article/view/8580