TY - CPAPER AU - Tatiana Orehova TI - TEMPORAL VARIABILITY OF THE GROUNDWATER RECHARGE: CASE STUDIES FROM BULGARIA T2 - SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings; 13th SGEM GeoConference on SCIENCE AND TECHNOLOGIES IN GEOLOGY, EXPLORATION AND MINING PY - 2013 DO - 10.5593/sgem2013/ba1.v2/s02.060 PB - Stef92 Technology ER -