| original |
Early Permian |
|
India(Bihar) |
Mukherjee,B. et al. Palyno-petrographic investigations of North Karanpura Coals around Ray-Bachra area, Bihar, and their significance on stratigraphy of the Measures. |
1972 |
| original |
Early Gondwana |
|
India(Bihar) |
Mukherjee,B. et al. Studies on petrography and miofloristics of Coals of Karharbari and Barakar Stages from parts of North Karanpura Coalfield, Bihar. |
1974 |
| details |
Nd |
|
Nd |
Tiwari,R.S. et al. Morphographic study of Permian palynomorphs-Callumispora, Parasaccites, Cruscisaccites and Faunipollenites. |
1989 |