TY - CPAPER AU - Vesselina Pavlova TI - DATA ANALYSIS FROM THE MONITORING OBSERVATIONS OF GROUNDWATER LEVELS IN THE SARMATIAN AQUIFER IN NORTHEASTERN BULGARIA T2 - SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings; 14th SGEM GeoConference on SCIENCE AND TECHNOLOGIES IN GEOLOGY, EXPLORATION AND MINING PY - 2014 DO - 10.5593/sgem2014/b12/s2.033 PB - Stef92 Technology ER -