The analysis of factors affecting the assessment of groundwater vulnerability to pollution with DRASTIC method within mining areas of the north-eastern part of the Upper Silesian Coal Basin on the basis of abandoned hardcoal mine ”Grodziec” in Będzin (Poland) / Sławomir Góra, Andrzej SZCZEPAŃSKI, Przemysław Bukowski // W: Groundwater vulnerability – from scientific concept to practical application : international conference : Ustroń, Poland 25–29 May 2015 : abstracts / ed. by Andrzej J. Witkowski, Sabina Jakóbczyk-Karpierz, Dorota Grabala. — Sosnowiec : Faculty of Earth Sciences Univeristy of Silesia, 2015. — ISBN: 978-83-61644-47-7. — S. 29. — A. Szczepański – afiliacja: Akademia Górniczo-Hutnicza