Adolf Cluss’ mark on the earliest Grade School in Spain. Foro de Educación, [S. l.], v. 12, n. 17, p. 69–89, 2014. DOI: 10.14516/fde.2014.012.017.004. Disponível em: https://forodeeducacion.com/ojs/index.php/fde/article/view/213. Acesso em: 20 jan. 2025.