MCKILLIP, John L. Objective Lens. Fine Focus, [S. l.], v. 4, n. 1, p. 9–11, 2018. DOI: 10.33043/FF.4.1.9-11. Disponível em: https://openjournals.bsu.edu/finefocus/article/view/1. Acesso em: 26 apr. 2024.