The effect of two challenge doses of Dictyocaulus filaria on the acquired immunity of sheep vaccinated with "Filiraq". The Iraqi Journal of Veterinary Medicine, [S. l.], v. 23, n. 1, p. 1–10, 1999. DOI: 10.30539/ijvm.v23i1.1183. Disponível em: https://jcovm.uobaghdad.edu.iq/index.php/Iraqijvm/article/view/1183.. Acesso em: 3 may. 2024.