HERBERT F. LIONBERGER. Some Implications from Diffusion Research for the Adoption of Farm Practices in India. Indian Journal of Extension Education, India, v. 1, n. 1, p. 18–25, 1965. Disponível em: https://epubs.icar.org.in/index.php/IJEE/article/view/159569. Acesso em: 15 jul. 2026.