TY - CPAPER AU - Dergach, Petr A. AU - Yushin, Vyacheslav I. AU - Duchkov, Anton A. TI - SIMPLE METHOD OF ABSOLUTE GEOPHONE CALIBRATION BY DISPLACEMENT STEP T2 - SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings; 15th International Multidisciplinary Scientific GeoConference SGEM2015, SCIENCE AND TECHNOLOGIES IN GEOLOGY, EXPLORATION AND MINING PY - 2015 SP - 999 EP - 1004 DO - 10.5593/sgem2015/b13/s5.129 PB - Stef92 Technology ER -