Moreira Alves, T., & Simões de Castro, S. (2009). NATURAL VULNERABILITY AND RISK OF SOILS IN THE AREAS OF THE GUARANI AQUIFER´S RECHARGE IN THE STATE OF GOIÁS, BRAZIL. Goiano Bulletin of Geography, 29(1), 135–150. https://doi.org/10.5216/bgg.v29i1.7302