Paulo J.C. Favas (2018). MULTIVARIATE ANALYSIS APPLIED TO THE STUDY OF ACID MINE DRAINAGES AND SURROUNDINGS SUPERFICIAL WATERS (ERVEDOSA MINE, NORTHERN PORTUGAL). SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings; 18th International Multidisciplinary Scientific GeoConference SGEM2018, Ecology, Economics, Education and Legislation, 565-572. https://doi.org/10.5593/sgem2018/5.1/s20.073