Airborne contamination by heavy metals and aluminum in the freshwater ecosystems of the Kola subarctic region (Russia) / Moiseenko T. I., Kudryavtseva L. P., Rodyushkin I. V. [et al.] // The Science of the Total Environment. - 1995. - Т. 160/161. - С. 715-727.

T.I. Moiseenko et al. / Sci. Total Environ. 160/161 (1995) 715-727 721 F i n l a n d Fig. 2. Contamination factors for Ni, Cu, Hg, and Cd (the isopleths) and concentrations of Ni and Cu ( Mg/g dry wt.) in surface sediments. concentrations s contamination factors