PIKE, R. J.; THELIN, G. P. Mapping the Nation’s Physiography by Computer. Cartographic Perspectives, [S. l.], n. 08, p. 15–24, 1990. DOI: 10.14714/CP08.1086. Disponível em: https://cartographicperspectives.org/index.php/journal/article/view/cp08-pike-thelin. Acesso em: 4 may. 2024.