S. R. SINGH, C. P. SINGH AND K. B. SINGH. Human Involvement in Social Forestry. Indian Journal of Extension Education, India, v. 26, n. 3&4, p. 100–101, 1990. DOI: 10.48165/. Disponível em: http://epubs.icar.org.in/index.php/IJEE/article/view/159536. Acesso em: 25 oct. 2025.