| original |
Middle Permian |
Late Permian |
India(Bihar) |
Tiwari,R.S. Miospore assemblage in some Coals of Barakar Stage (Lower Gondwana), of India. |
1965 |
| details |
Late Artinskian |
|
India |
Tiwari,R.S. Palaeozoic cryptogamic spores. (In: Aspects and Appraisal of Indian Palaeobotany. K.R.Surange, editor) |
1974 |
| details |
Early Permian |
|
|
Bharadwaj,D.C. et al. Palynostratigraphy of Lower Gondwana deposits in Parana and Maranhao Basins, Brazil. |
1976 |
| details |
Permian |
|
India(Madhya Pradesh) |
Lakhanpal,R.N. et al. A catalogue of Indian fossil plants |
1976 |