MORGAN, P. Technological developments in Zimbabwe’s rural water supply and sanitation programme. Zimbabwe Science News, [S. l.], v. 33, n. 1, p. 20–25, 1999. DOI: 10.4314/zsn.v33i1.18521. Disponível em: https://www.ajol.info/index.php/zsn/article/view/18521. Acesso em: 18 aug. 2026.