LONG-TERM TRENDS IN SMOKE AND SULPHUR DIOXIDE POLLUTION IN THE REPUBLIC OF SOUTH AFRICA. Clean Air Journal, [S. l.], v. 5, n. 4, p. 11–20, 1980. DOI: 10.17159/caj/1980/5/6.7382. Disponível em: https://cleanairjournal.org.za/article/view/7382. Acesso em: 22 nov. 2024.