MCKILLIP, John L. Objective Lens. Fine Focus, [S. l.], v. 4, n. 2, p. 151–152, 2018. DOI: 10.33043/FF.4.2.151-152. Disponível em: https://openjournals.bsu.edu/finefocus/article/view/1541. Acesso em: 28 mar. 2024.