BILLSON, H. G. Notes on the Tour of the Forest School Students in the Western Dun and Saharanpur Siwaliks in 1894. Indian Forester, [S. l.], v. 20, n. 7, p. 243–256, DOI: 10.36808/if/1894/v20i7/15179. Disponível em: http://indianforester.co.in/index.php/indianforester/article/view/15179. Acesso em: 5 dec. 2025.