| original |
Middle Carboniferous |
|
USSR(Ukrainian SSR) |
Ishchenko,A.M. Atlas of microspores and pollen of the Middle Carboniferous Period in the western part of the Donets Basin. |
1952 |
| 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 |
| original |
Coal Measure |
|
England(Staffordshire) |
Millott,J.O. The microspores in the Coal-Seams of North Staffordshire.Part 2. The Seams of the Cheadle Coalfield. |
1945 |