LEGACY, James; SYMONS, William. A Pretest/Posttest Model For Developing New Topic Teaching Materials In Agriculture. Journal of Agricultural Education, [S. l.], v. 23, n. 2, p. 15–18, 1982. DOI: 10.5032/jaatea.1982.02015. Disponível em: https://jae-online.org/index.php/jae/article/view/1258. Acesso em: 14 sep. 2024.