KENNEDY, G. Geographic Information Systems, An Introduction, Second Edition. Cartographic Perspectives, [S. l.], n. 38, p. 81–83, 2001. DOI: 10.14714/CP38.798. Disponível em: https://cartographicperspectives.org/index.php/journal/article/view/cp38-kennedy. Acesso em: 23 apr. 2024.