BRUENING, Thomas H.; RADHAKRISHNA, Rama B.; ROLLINS, Timothy J. Environmental Issues: Farmers’ Perceptions About Usefulness Of Informational And Orgranizational Sources. Journal of Agricultural Education, [S. l.], v. 33, n. 2, p. 34–42, 1992. DOI: 10.5032/jae.1992.02034. Disponível em: https://jae-online.org/index.php/jae/article/view/899. Acesso em: 22 feb. 2025.