SHEFFIELD, E. F. A Coherent System for Manitoba. Canadian Journal of Higher Education, [S. l.], v. 4, n. 1, p. 111–116, 1974. DOI: 10.47678/cjhe.v4i1.182600. Disponível em: https://cjhe-rces.ca/index.php/cjhe/article/view/182600. Acesso em: 12 may. 2026.