Seasonal Fluctuations In Co, Ni, Cu, Zn, Cd, Pb Concentrations In Surface Microlayers And Subsurface Water Of Two City PondsJ. P. Antonowicz and J. TrojanowskiE3S Web of Conferences, 1 (2013) 24008DOI: https://doi.org/10.1051/e3sconf/20130124008