SINGH, Bhai. Improved Hypsometer. Indian Forester, [S. l.], v. 90, n. 11, p. 785–787, 1964. DOI: 10.36808/if/1964/v90i11/25048. Disponível em: https://indianforester.co.in/index.php/indianforester/article/view/25048. Acesso em: 21 aug. 2025.