VOGEL, S.; WIDMER, E. 100 Jahre Raumausstattung Widmer. Backnanger Jahrbuch, [S. l.], v. 28, p. 276, 2020. DOI: 10.53458/bjb.v28i.10005. Disponível em: https://journals.wlb-stuttgart.de/index.php/bjb/article/view/10005. Acesso em: 27 dez. 2024.