@inproceedings{sgem2015s1030,
  title = {IMPACT OF GEOLOGICAL AND MINING CONDITIONS ON TO COSTS OF DRILLING THE ACCESS WORKINGS IN HARD COAL MINES WITHIN THE UPPER SILESIAN COAL BASIN (POLAND)},
  author = {Borys Borowka},
  booktitle = {SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings; 15th International Multidisciplinary Scientific GeoConference SGEM2015, SCIENCE AND TECHNOLOGIES IN GEOLOGY, EXPLORATION AND MINING},
  year = {2015},
  pages = {},
  publisher = {Stef92 Technology},
  doi = {10.5593/sgem2015/b11/s1.030}
}