WEISER, Robert G.; HARPER, Joe G.; HILL, George C. Agricultural Mechanics Instructional Units currently Being Taught by Nevada Vocational Agricultur Teachers. Journal of Agricultural Systems, Technology, and Management, [S. l.], v. 2, n. 1, p. 11–18, 1986. Disponível em: https://jastm.org/index.php/jastm/article/view/11863. Acesso em: 23 feb. 2025.