NEGI, Jagmohan Singh. History and Economics of Elephant Ploughing. Indian Forester, [S. l.], v. 81, n. 9, p. 578–580, 1955. DOI: 10.36808/if/1955/v81i9/23998. Disponível em: https://indianforester.co.in/index.php/indianforester/article/view/23998. Acesso em: 21 aug. 2025.