TY - CPAPER AU - Yu. A. Fedorov TI - ABOUT THE PRINCIPAL SOURCES OF HEAVY METALS IN THE NORTHERN DVINA RIVER ESTUARY T2 - SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings; SGEM2011 11th International Multidisciplinary Scientific GeoConference PY - 2011 DO - 10.5593/sgem2011/s20.103 PB - Stef92 Technology ER -