S. RAMKUMAR • AND P.S. PUSHKARAN. Symbolic Adoption Behaviour of Participants of Correspondence Course. Indian Journal of Extension Education, India, v. 27, n. 3-4, p. 116–117, 1991. DOI: 10.48165/. Disponível em: https://epubs.icar.org.in/index.php/IJEE/article/view/160581. Acesso em: 24 oct. 2025.