MIGL, J. Kilometerlange Filmrollen - Jahresstatistik der Microfilmstelle. WLBforum, Stuttgart, v. 2, n. 1, p. 29–30, 2000. DOI: 10.53458/wlbf.v2i1.518. Disponível em: https://journals.wlb-stuttgart.de/ojs/index.php/wlbf/article/view/518. Acesso em: 19 apr. 2024.