@inproceedings{sgem2001paper,
  title = {A NEW CLAY FIELD IN THE OUTSKIRTS OF CHIRPAN, BULGARIA},
  author = {Lenin Dragomanov},
  booktitle = {1st International Scientific Conference - SGEM2001},
  year = {2001},
  pages = {51- 56},
  publisher = {SGEM Scientific GeoConference},
  doi = {}
}