THIRY, C. Map Room Colorado School of Mines. Cartographic Perspectives, [S. l.], n. 26, p. 49–51, 1997. DOI: 10.14714/CP26.724. Disponível em: https://cartographicperspectives.org/index.php/journal/article/view/cp26-thiry. Acesso em: 6 may. 2024.