CHALK, P. The Cartographic Section At The University Of Western Ontario. Cartographic Perspectives, [S. l.], n. 23, p. 21–23, 1996. DOI: 10.14714/CP23.767. Disponível em: https://cartographicperspectives.org/index.php/journal/article/view/cp23-chalk. Acesso em: 28 may. 2026.