KROGH, L. Water and arid lands of the western United States. Ed. by Mohamed T. El-Ashry and Diana C. Gibbons. Geografisk Tidsskrift, [S. l.], v. 90, 1990. Disponível em: https://tidsskrift.dk/geografisktidsskrift/article/view/44819. Acesso em: 25 okt. 2021.