HEBIN, O. An Elementary Program on Urban Description: The Cell-Counting Method. Geografisk Tidsskrift - Danish Journal of Geography, [S. l.], v. 67, n. 2, p. 137–157, 1968. Disponível em: https://tidsskrift.dk/geografisktidsskrift/article/view/129072. Acesso em: 19 may. 2024.