Immunization of pregnant cows with (coligen) to prevent colibacillosis in calves. The Iraqi Journal of Veterinary Medicine, [S. l.], v. 10, n. 1, p. 27–45, 1986. DOI: 10.30539/rzw0nv69. Disponível em: https://jcovm.uobaghdad.edu.iq/index.php/Iraqijvm/article/view/1844.. Acesso em: 22 jul. 2024.