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Geolocation
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Author - title
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Year
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| details | Givetian | Visean | USSR | Richardson,J.B. Stratigraphical distribution of some Devonian and Lower Carboniferous spores, (Report of Working Group No 13 B CIMP) | 1964 |
| details | Strunian | Visean | Spitsbergen | Richardson,J.B. Stratigraphical distribution of some Devonian and Lower Carboniferous spores, (Report of Working Group No 13 B CIMP) | 1964 |