File:BGR-Klassifikation Kohle.jpg
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| Description | BGR-Klassifikation Kohle |
| Date | |
| Source | Energierohstoffe 2009: Reserven, Ressourcen, Verfügbarkeit, Bundesanstalt für Geowissenschaften und Rohstoffe (BGR), Hannover, Seite 21, ISBN 978-3-9813373-1-0 |
| Author | Bundesanstalt für Geowissenschaften und Rohstoffe |
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| current | 18:08, 31 March 2012 | | 826 × 801 (173 KB) | Ion Tichy (talk | contribs) | ({{Information= Classification of coals by vitrinite reflection and volatiles |Description=BGR-Klassifikation Kohle |Source=Energierohstoffe 2009: Reserven, Ressourcen, Verfügbarkeit, Bundesanstalt für Geowissenschaften und Rohstoffe (BGR), Hannover... |
| 18:40, 28 March 2012 |  | 826 × 801 (173 KB) | Ion Tichy (talk | contribs) | {{Information |Description=BGR-Klassifikation Kohle |Source=Energierohstoffe 2009: Reserven, Ressourcen, Verfügbarkeit, Bundesanstalt für Geowissenschaften und Rohstoffe (BGR), Hannover, Seite 21, ISBN 978-3-9813373-1-0 |Date=2009 |Author=Bundesansta... |
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