JOHNSON, Donald M.; SCHUMACHER, Leon G.; STEWART, Bob R. Preceptions of Teachers and Experts Concerning the Importance of Agricultural Mechanics Labatory Management Factors. Journal of Agricultural Systems, Technology, and Management, [S. l.], v. 5, n. 2, p. 9–15, 1990. Disponível em: https://jastm.org/index.php/jastm/article/view/11935. Acesso em: 19 may. 2026.