SMITH, Mack W.; KAHLER, Alan A. Needed: Educational Objectives And Administrative Criteria For The National FFA Contests. Journal of Agricultural Education, [S. l.], v. 28, n. 2, p. 45–50, 1987. DOI: 10.5032/jaatea.1987.02045. Disponível em: https://jae-online.org/index.php/jae/article/view/401. Acesso em: 11 aug. 2024.