PURPUS, E. Kunst- und Museumsbibliotheken der Stadt Köln (KMB). AKMB-news: Informationen zu Kunst, Museum und Bibliothek, [S. l.], v. 10, n. 3, p. 45–47, 2009. DOI: 10.11588/akmb.2004.3.535. Disponível em: https://journals.ub.uni-heidelberg.de/index.php/akmb-news/article/view/535. Acesso em: 4 mai. 2024.