VARIABILITY OF CHEMICAL COMPOSITION OF GRAOUNDWATER AT THE MIOCENE AQUIFER IN THE POZNAŃ-GOSTYŃ FAULT GRABEN REGION (POLAND) Authors Marcin Siepak Karel Novotny Tomas Vaculovic Józef Górski Jan Przybyłek Abstract . Issue Vol. 441 No. 441 (2010): Hydrogeologia z.X Section Articles