BÜHLER, Jürg. Digital Maps in Map Collections - Presenting New Electronic Media. LIBER Quarterly: The Journal of the Association of European Research Libraries, [S. l.], v. 9, n. 2, p. 228–234, 1999. DOI: 10.18352/lq.7537. Disponível em: https://liberquarterly.eu/article/view/10125.. Acesso em: 27 jul. 2024.