@inproceedings{sgem2015s3092,
  title = {THE POSSIBILITY TO OPEN A SECURED GRAVEL PIT},
  author = {Andrea Policka},
  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/b13/s3.092}
}