FRICK, Martin J. Developing A National Framework For A Middle School Agricultural Education Curriculum. Journal of Agricultural Education, [S. l.], v. 34, n. 2, p. 77–84, 1993. DOI: 10.5032/jae.1993.02077. Disponível em: https://jae-online.org/index.php/jae/article/view/2225. Acesso em: 2 may. 2026.