LOVE, Gene M. Needed - More Functional Units Of Instruction. Journal of Agricultural Education, [S. l.], v. 5, n. 2, p. 18–21, 1964. DOI: 10.5032/jaatea.1964.02018. Disponível em: https://jae-online.org/index.php/jae/article/view/2023. Acesso em: 13 jul. 2024.