| details |
Kungurian |
|
USSR(Permsk Oblast) |
Sivertseva,I.A. The spore-pollen complexes of the Kungurian and Ufimian Stages of the Solikamian Region |
1969 |
| details |
Kungurian |
|
USSR(Permsk Oblast) |
Sivertseva,I.A. et al. Spore and pollen complexes of some Permian horizons of Upper Petchora Depression |
1972 |
| original |
Permian |
|
USSR |
Andreeva,E.M. et al. Palaeopalynology. (Three Volumes: Volume I: Methods. Volume II: Complexes of palynomorphs of the Precambrian-Holocene of the USSR. Volume III: Figures and Plates. Editor-I.M. Pokrovskaya) |
1966 |