TY - CPAPER AU - Ruslan Ulengov TI - SOME APPROACHES TO GEOECOLOGICAL EVALUATION OF REGIONAL GEOSYSTEMS OF THE REPUBLIC OF TATARSTAN T2 - SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings; 14th SGEM GeoConference on ECOLOGY, ECONOMICS, EDUCATION AND LEGISLATION PY - 2014 DO - 10.5593/sgem2014/b51/s20.085 PB - Stef92 Technology ER -