Freire Guerra, Maria, Souza, Marcos Jose, AND Lustosa, Jacqueline. " A PECUÁRIA, O ALGODÃO E A DESERTIFICAÇÃO NOS SERTÕES DO MÉDIO JAGUARIBE – CEARÁ/BRASIL (the cattle, the cotton and the desertification in the interiors of Medium Jaguaribe – Ceará/Brazil)" Mercator [Online], Volume 11 Number 25 (13 December 2011)