WILLIAMS, B. F. Community Geography: GIS in Action and Community Geography: GIS in Action Teacher’s Guide. Cartographic Perspectives, [S. l.], n. 49, p. 75–78, 2004. DOI: 10.14714/CP49.444. Disponível em: https://cartographicperspectives.org/index.php/journal/article/view/cp49-williams. Acesso em: 3 may. 2024.