B.N. SINGH AND A.P. SINGH. Inservice Training Needs of Agricultural Extension Officers. Indian Journal of Extension Education, India, v. 2, n. 1&2, p. 17–21, 1966. DOI: 10.48165/. Disponível em: https://epubs.icar.org.in/index.php/IJEE/article/view/159637. Acesso em: 15 jul. 2026.