Kemerich, Pedro Daniel da Cunha, et al. “ANALYSIS OF NATURAL VULNERABILITY TO GROUNDWATER CONTAMINATION: COMPARISON BETWEEN THE GOD AND DRASTIC METHODOLOGIES ”. Notheast Geoscience Journal, vol. 6, no. 2, Aug. 2020, pp. 45-53, doi:10.21680/2447-3359.2020v6n2ID19080.