Constraints and Strategies for Enhancing Pig Production in Delta State, Nigeria. Global Journal of Science Frontier Research, [S. l.], v. 15, n. D8, p. 47–51, 2015. Disponível em: https://www.journalofscience.org/index.php/GJSFR/article/view/1644. Acesso em: 14 aug. 2026.