HAPPEL, T. What Role does the Teachers’ Union in Wisconsin have on Student Achievement?. New Trends and Issues Proceedings on Humanities and Social Sciences, [S. l.], v. 2, n. 3, p. 34–38, 2016. DOI: 10.18844/prosoc.v2i3.1054. Disponível em: https://un-pub.eu/ojs/index.php/pntsbs/article/view/1054. Acesso em: 2 may. 2024.