Spore type B7
- Citations total:
- 2
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| original | Nd | England(Durham) | Raistrick,A. The correlation of Coal-Seams by microspore Content.Part 2. The Trencherbone Seam, Lancashire, and the Busty Seams, Durham | 1939 | |
| original | Nd | England(Lancashire) | Raistrick,A. The correlation of Coal-Seams by microspore Content.Part 2. The Trencherbone Seam, Lancashire, and the Busty Seams, Durham | 1939 |