KEEN, Gilbert R. Aeroplane Timbers. Indian Forester, [S. l.], v. 46, n. 4, p. 201–202, 1920. DOI: 10.36808/if/1920/v46i4/18316. Disponível em: http://indianforester.co.in/index.php/indianforester/article/view/18316. Acesso em: 5 dec. 2025.