HIRA NAND AND N C JAIN. A study of the extension methods used by block personnel for extending improved agricultural practices. Indian Journal of Extension Education, India, v. 3, n. 1&2, p. 74–81, 1967. DOI: 10.48165/. Disponível em: https://epubs.icar.org.in/index.php/IJEE/article/view/160353. Acesso em: 15 jul. 2026.