BALLE, W. 70er-Feier der Jahrgänge 1933/34. Backnanger Jahrbuch, [S. l.], v. 12, p. 236–237, 2004. DOI: 10.53458/bjb.v12i.9196. Disponível em: https://journals.wlb-stuttgart.de/ojs/index.php/bjb/article/view/9196. Acesso em: 22 juli. 2024.