CASE, Donald M.; BIRKHOLZ, Robert J.; CAMPBELL, Rex R. USDA summer internship programs: A case study of Lincoln University participants. Journal of Agricultural Education, [S. l.], v. 38, n. 2, p. 8–14, 1997. DOI: 10.5032/jae.1997.02008. Disponível em: https://jae-online.org/index.php/jae/article/view/1129. Acesso em: 23 jun. 2026.