GIBSON, D.B. COAL DISCARD DUMP CLADDING — A SOLUTION TO AIR POLLUTION. Clean Air Journal, [S. l.], v. 7, n. 5, p. 21–25, 1998. DOI: 10.17159/caj/1988/7/5.7204. Disponível em: https://cleanairjournal.org.za/article/view/7204. Acesso em: 23 apr. 2024.