| 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 |
| original |
Nd |
|
Nd |
Schopf,J.M. et al. An annotated synopsis of Paleozoic fossil spores and the definition of generic groups. |
1944 |
| original |
Early Gondwana |
|
India(West Bengal) |
Ghosh,A.K. et al. A study of the microfossils and the correlation of some productive Coal Seams of the Raniganj Coalfield, Bengal, India. |
1948 |