Media type: E-Article Title: Humic-sourced organic matter from the Upper Silesian ZnPb deposits (Poland) Contributor: Sass-Gustkiewicz, Maria; Kwieciǹska, Barbara imprint: Elsevier BV, 1994 Published in: International Journal of Coal Geology Language: English DOI: 10.1016/0166-5162(94)90008-6 ISSN: 0166-5162 Keywords: Stratigraphy ; Economic Geology ; Geology ; Fuel Technology Origination: Footnote: