Kasprzak, A., Motyka, J. and Wardas-Lasoń, M. 2013. Changes in the chemical composition of groundwater in Quaternary aquifer in Old Krakow, Poland (years 2002-2012). Geology, Geophysics and Environment. 39, 2 (Jun. 2013), 143. DOI:https://doi.org/10.7494/geol.2013.39.2.143.