Maruta, M. 2021. Possibility of using a portable multi-gas detector Dräger X-am 8000 for monitoring explosive gases in the area of historical oil and gas mines in the Podkarpackie region . Journal of Geotechnology and Energy. 38, 2 (Aug. 2021). DOI:https://doi.org/10.7494/jge.2021.38.2.4352.