ROBERT C. CLARK. Extension Education as a Profession. Indian Journal of Extension Education, India, v. 1, n. 1, p. 9–13, 1965. DOI: 10.48165/. Disponível em: https://epubs.icar.org.in/index.php/IJEE/article/view/159564. Acesso em: 15 jul. 2026.