BACKMAN, H A. Visual Standards for Civil Aviation. Canadian Journal of Optometry, [S. l.], v. 46, n. 1, 1984. DOI: 10.15353/cjo.v46i1.4332. Disponível em: https://openjournals.uwaterloo.ca/index.php/cjo/article/view/4332. Acesso em: 6 jun. 2025.