JOHNSON, M. L. GIS for Homeland Security. Cartographic Perspectives, [S. l.], n. 62, p. 43–46, 2009. DOI: 10.14714/CP62.186. Disponível em: https://cartographicperspectives.org/index.php/journal/article/view/cp62-johnson. Acesso em: 23 apr. 2024.