The Cartography of Gypseous Soils In San Luis Potosi State, Mexico.

VĂ­ctor Manuel Ruiz-Vera1, Juan Felipe Martinez-Montoya1 and Juan Herrero-Isern2, (1)Campus San Luis Potosi, Colegio de Postgraduados, Salinas, Mexico, (2)EEAD-CSIC, Zaragoza, Spain