KIRSTEIN, C.E. A CASE FOR STATE ASSISTANCE TOWARDS THE COST OF AIR POLLUTION CONTROL. Clean Air Journal, [S. l.], v. 6, n. 6, p. 13–17, 1984. DOI: 10.17159/caj/1984/6/6.7365. Disponível em: https://cleanairjournal.org.za/article/view/7365. Acesso em: 6 apr. 2025.