NON-GENETIC FACTORS THAT PREPARATED PENEUMONIA INCIDENCE IN HOLSTEIN CATTLE AND THEIR EFFECT ON MILK-PRODUCTION IN THE MIDDLE OF IRAQ. Mesopotamia Journal of Agriculture, [S. l.], v. 39, n. 2, p. 109–115, 2011. DOI: 10.33899/magrj.2011.30457. Disponível em: https://magrj.uomosul.edu.iq/index.php/magrj/article/view/58536. Acesso em: 29 sep. 2026.