Organic geochemistry of Duckmantian (Pennsylvanian) coals from the Ruhr Basin, western Germany
| Autor: | Böcker, J., Littke, R., Hartkopf-Fröder, C., Jasper, K., Schwarzbauer, J. |
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| Zdroj: | In International Journal of Coal Geology 1 March 2013 107:112-126 |
| Databáze: | ScienceDirect |
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