FREDRICH, H. 25 Jahre Junge Briefmarkenfreunde Backnang. Backnanger Jahrbuch, [S. l.], v. 16, p. 255–256, 2008. DOI: 10.53458/bjb.v16i.9356. Disponível em: https://journals.wlb-stuttgart.de/index.php/bjb/article/view/9356. Acesso em: 18 dez. 2024.