R.H.J., .-. C. D. Ollier, C. J. Lawrance, P. H. T. Beckett & R. Webster: Terrain Classification and Data Storage. Land Systems of Uganda. Geografisk Tidsskrift - Danish Journal of Geography, [S. l.], v. 73, 1974. Disponível em: https://tidsskrift.dk/geografisktidsskrift/article/view/45711. Acesso em: 16 aug. 2024.