BIRKENHOLZ, Robert J. Developing A Philosophic Model For Vocational Agriculture. Journal of Agricultural Education, [S. l.], v. 27, n. 1, p. 13–17, 1986. DOI: 10.5032/jaatea.1986.01013. Disponível em: https://jae-online.org/index.php/jae/article/view/1285. Acesso em: 13 jul. 2024.