BEARD, C. The Future Of Digital Data In Map Collections: One Perspective. Cartographic Perspectives, [S. l.], n. 21, p. 18–20, 1995. DOI: 10.14714/CP21.869. Disponível em: https://cartographicperspectives.org/index.php/journal/article/view/cp21-beard. Acesso em: 3 may. 2024.