TY - CPAPER AU - Rustam Khadievich Musin AU - E.A. Korolev AU - Ksenia Zotina TI - VARIATIONS AND CONDITIONS OF THE COMPOSITION NATURAL WATERS IN THE CENTRAL EUROPEAN RUSSIA (ON EXAMPLE OF THE TATARSTAN REPUBLIC) T2 - SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings; 17th International Multidisciplinary Scientific GeoConference SGEM2017, Water Resources. Forest, Marine and Ocean Ecosystems PY - 2017 SP - 777 EP - 784 DO - 10.5593/sgem2017/31/s12.098 PB - STEF92 Technology ER -