COPPOCK, J. T. Tobacco growing in Nigeria. ERDKUNDE, [S. l.], v. 19, n. 4, p. 297–306, 1965. DOI: 10.3112/erdkunde.1965.04.04. Disponível em: https://www.erdkunde.uni-bonn.de/article/view/1477. Acesso em: 30 apr. 2025.