Nascimento, Flávio Rodrigues do, et al. “Geo-Environmental Analysis and Identification of Degraded Areas Susceptible to Desertification in a Semi-Arid, Tropical Ecozone: The Acaraú River Basin in Northeastern Brazil”. Sociedade & Natureza, vol. 1, no. 1, May 2005, https://doi.org/10.14393/SN-v1-2005-9720.