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\bibitem{Gorka_etal2009} {\textquotedblleft}\textit{Comparative assessment of air quality in two health resorts using carbon isotopes and palynological analyses}{\textquotedblright}. G{\'o}rka M, Jedrysek MO, Maj J, Worobiec A, Buczy{\'n}ska A, Stefaniak E, Krata A, Van Grieken R, Zwozdziak A, S{\'o}wka I, Zwozdziak J, Lewicka-Szczebak D, Atmospheric environment \textbf{43}, 682 (2009).   http://doi.org/10.1016/J.ATMOSENV.2008.09.056

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