@inproceedings{sgem2017s20111,
  title = {SECONDARY POLLUTION IN THE WATER SUPPLY SYSTEM ON THE EXAMPLE OF THE OPOLE CITY},
  author = {Iwona Klosok-Bazan and Paulina Kotas},
  booktitle = {SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings; 17th International Multidisciplinary Scientific GeoConference SGEM2017, Ecology, Economics, Education and Legislation},
  year = {2017},
  pages = {853-860},
  publisher = {STEF92 Technology},
  doi = {10.5593/sgem2017/51/s20.111}
}