MACPHERSON, Ron. COETF: Philanthropy or just "paying our dues"?. Canadian Journal of Optometry, [S. l.], v. 43, n. 2-3, p. 1, 1981. DOI: 10.15353/cjo.v43i2-3.4157. Disponível em: https://openjournals.uwaterloo.ca/index.php/cjo/article/view/4157. Acesso em: 20 jun. 2025.