For citations:
Nemirovskaya I.A., Khaustov A.P., Redina M.M. Geochemical Barriers on Marginal Filter of the Severnaya Dvina River. Izvestiya Rossiiskoi Akademii Nauk. Seriya Geograficheskaya. 2018;(6):49-56. (In Russ.) https://doi.org/10.1134/S2587556618060122