GIBSON, H. S. A Method of Measuring the Height of Standing Trees. Indian Forester, [S. l.], v. 37, n. 8, p. 455–458, 1911. DOI: 10.36808/if/1911/v37i8/17407. Disponível em: http://indianforester.co.in/index.php/indianforester/article/view/17407. Acesso em: 4 dec. 2025.