%0 Journal Article %T Selective statistical estimates of multi-year monthly concentrations of biogenous pollution of small rivers of the Northwest zone of the Russian Federation %A Kovalenko, S.N. %K Non-chernozem zone of the Russian Federation, hydrochemical monitoring of the environment, small rivers, biogenes, statistical processing, correlation and autocorrelation analysis. %J Melioration and Water Management %D 2020 %N 2019 %P 4 %I ANO Editorial Board Melioration and water management