WELLS, B. SOUTH AFRICA, HUMPTY DUMPTY AND AIR POLLUTION. Clean Air Journal, [S. l.], v. 7, n. 6, p. 31–32, 1988. DOI: 10.17159/caj/1988/7/6.7211. Disponível em: https://cleanairjournal.org.za/article/view/7211. Acesso em: 3 may. 2024.