@inproceedings{sgem2015s5129,
  title = {SIMPLE METHOD OF ABSOLUTE GEOPHONE CALIBRATION BY DISPLACEMENT STEP},
  author = {Petr Dergach},
  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/s5.129}
}