LENOX-CONYNGHAM, G. P. Report on the Levelling Carried out to Ascertain the Motion , if any of Bench Marks Fixed to Trees in the Compound of the Trignometrical Survey Office, Dehra Dun, during the Period April 1914 to April 1917. Indian Forester, [S. l.], v. 43, n. 11-12, p. 505–509, DOI: 10.36808/if/1917/v43i11-12/18182. Disponível em: https://indianforester.co.in/index.php/indianforester/article/view/18182. Acesso em: 29 oct. 2025.