KLEENE, Marvin. An Analysis Of Profitability Factors For Selected Farming Types In The Minnesota Vocational Agriculture Farm Management Education Program. Journal of Agricultural Education, [S. l.], v. 21, n. 3, p. 42–46, 1980. DOI: 10.5032/jaatea.1980.03042. Disponível em: https://jae-online.org/index.php/jae/article/view/2123. Acesso em: 23 jun. 2026.