B.N. SINGH AND P.N. JHA. Utilization of Sources of Farm Information in Relation to Adoption of Improved Agricultural Practices. Indian Journal of Extension Education, India, v. 1, n. 1, p. 34–42, 1965. Disponível em: https://epubs.icar.org.in/index.php/IJEE/article/view/159572. Acesso em: 15 jul. 2026.