MCKILLIP, John. Objective Lens. Fine Focus, [S. l.], v. 9, n. 1, p. 6–11, 2023. DOI: 10.33043/FF.9.1.6-11. Disponível em: https://openjournals.bsu.edu/finefocus/article/view/4315. Acesso em: 23 apr. 2024.