STEPHENSON, R. Update of NACA history - 1995-1999. Clean Air Journal, [S. l.], v. 10, n. 4, 1999. DOI: 10.17159/caj/1999/10/4.7333. Disponível em: https://cleanairjournal.org.za/article/view/7333. Acesso em: 29 mar. 2024.