TY - CPAPER AU - Elena Petrova AU - Larisa Linkina TI - BOUNDARIES AND STRUCTURE OF AKCHAGYLIAN STAGE WITHIN MIDDLE VOLGA AREA T2 - SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings; 17th International Multidisciplinary Scientific GeoConference SGEM2017, Science and Technologies in Geology, Exploration and Mining PY - 2017 SP - 65 EP - 72 DO - 10.5593/sgem2017/11/s01.008 PB - STEF92 Technology ER -