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Author - title
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| details | Llandoverian | Emsian | Czechoslovakia | Ivanicka,J. et al. Results of biostratigraphical study in part of Gelnica Group. | 1989 |
| details | Llandoverian | Devonian | Czechoslovakia | Ivanicka,J. et al. Results of biostratigraphical study in part of Gelnica Group. | 1989 |