Changes of selected micro-pollution concentrations in the long carbonate sediment cores of the southern part of Wigry Lake (NE Poland) / U. ALEKSANDER-KWATERCZAK, D. PROSOWICZ, J. RUTKOWSKI, J. SZCZEPAŃSKA // Polish Journal of Environmental Studies ; ISSN 1230-1485. — 2009 vol. 18 no. 2B, s. 51–55. — Bibliogr. s. 54–55, Abstr.. — IX Conference on micropollutants in human environment : Poland, Częstochowa 28–30 April 2009 /Częstochowa University of Technology. Departament of Chemistry, Water and Wastewater Technology. — Olsztyn : HARD Publishing Company, 2009