TY - CPAPER AU - Yavor Chapanov TI - CORRELATION BETWEEN VOLCANIC SULFATE AND SOME SOLAR CYCLES T2 - SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings; 21st SGEM International Multidisciplinary Scientific GeoConference Proceedings 2021, Science and Technologies in Geology, Exploration And Mining PY - 2021 SP - 443 EP - 450 DO - 10.5593/sgem2021/1.1/s05.081 PB - STEF92 Technology ER -