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Author - title
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| details | Early Namurian A | Poland | Jachowicz,A. Spore associations and stratigraphical position of Coal Seam at Kolzlowa Gora, (Upper Silesian Basin). | 1959 | |
| details | Early Namurian A | Poland | Jachowicz,A. Spore associations and stratigraphical position of Coal Seam at Kolzlowa Gora, (Upper Silesian Basin). | 1959 |