KELSO, N. V.; PATTERSON, T. Natural Earth Vector. Cartographic Perspectives, [S. l.], n. 64, p. 45–50, 2009. DOI: 10.14714/CP64.148. Disponível em: https://cartographicperspectives.org/index.php/journal/article/view/cp64-kelso-patterson. Acesso em: 27 may. 2024.