P.N. JHA AND B.N. SINGH. Utilisation of sources of farm information as related to characteristics of farmers. Indian Journal of Extension Education, India, v. 1, n. 4, p. 294–302, 1966. DOI: 10.48165/. Disponível em: https://epubs.icar.org.in/index.php/IJEE/article/view/159443. Acesso em: 5 jun. 2026.