KREBS, Alfred H. Basic Elements of Evaluation of Vocational Education in Agriculture at the Secondary Level. Journal of Agricultural Education, [S. l.], v. 11, n. 2, p. 20–33, 1970. DOI: 10.5032/jaatea.1970.02020. Disponível em: https://jae-online.org/index.php/jae/article/view/405. Acesso em: 13 jul. 2024.