WOLLENHAUPT, H. 50 Jahre Raumfahrt in Backnang. Backnanger Jahrbuch, [S. l.], v. 19, p. 181–206, 2011. DOI: 10.53458/bjb.v19i.9489. Disponível em: https://journals.wlb-stuttgart.de/ojs/index.php/bjb/article/view/9489. Acesso em: 23 juli. 2024.