NITTMANN, M. 70er-Feier des Backnanger Jahrgangs 1931/32. Backnanger Jahrbuch, [S. l.], v. 9, p. 268–269, 2001. DOI: 10.53458/bjb.v9i.9080. Disponível em: https://journals.wlb-stuttgart.de/ojs/index.php/bjb/article/view/9080. Acesso em: 22 juli. 2024.