O'FARRELL, P.J.; ANDERSON, P.; MILTON, S.; DEAN, W. Human response and adaptation to drought in the arid zone: lessons from southern Africa. South African Journal of Science, [S. l.], v. 105, n. 1/2, 2009. Disponível em: https://sajs.co.za/article/view/10350. Acesso em: 22 nov. 2024.