Details Details PDF BIBTEX RIS Title Initial Assessment of Variability in the Modes of Occurrence of Some Trace Elements in Coal Seams with Vertical Profiles in the Upper Silesian Coal Basin in Poland Journal title Archives of Mining Sciences Yearbook 2020 Volume vol. 65 Issue No 4 Authors Parzentny, Henryk R. ; Róg, Leokadia Keywords mode of occurrence ; trace elements ; variability ; bituminous coal ; USCB Divisions of PAS Nauki Techniczne Coverage 723-736 Publisher Committee of Mining PAS Date 2020.12.16 Type Article Identifier DOI: 10.24425/ams.2020.134143 Source Archives of Mining Sciences; 2020; vol. 65; No 4; 723-736