HELD, G; SNYMAN, G.M; SCHEIFINGER, H. Seasonal variation and trends of atmospheric particulates on the South African highveld: 1982-1990. Clean Air Journal, [S. l.], v. 8, n. 8, 1993. DOI: 10.17159/caj/1993/8/8.7314. Disponível em: https://cleanairjournal.org.za/article/view/7314. Acesso em: 15 jun. 2024.