HAEFTEN, C. J. Van. A Day in the Black Forest. Indian Forester, [S. l.], v. 65, n. 1, p. 18–25, 1938. DOI: 10.36808/if/1939/v65i1/27551. Disponível em: https://indianforester.co.in/index.php/indianforester/article/view/27551. Acesso em: 27 dec. 2025.