| details |
Devonian |
|
USSR(Saratov) |
Chepikov,K.R. et al. Spores and pollen in oil, gas, condensates and oil-field waters. (In: Sporen and Pollen in Oils and Deposits of Oil and Gas-Bearing Regions of the USSR.) |
1971 |
| details |
Late Carboniferous |
|
USSR(Turkmen SSR) |
Chepikov,K.R. et al. Spores and pollen in oil, gas, condensates and oil-field waters. (In: Sporen and Pollen in Oils and Deposits of Oil and Gas-Bearing Regions of the USSR.) |
1971 |
| original |
Bashkirian |
|
USSR(Yaroslav) |
Medvedeva,A.M. et al. Study of acritarchae from oils and rocks of the Volga-Ural Regions by replica method. (In: Sporen and Pollen in Oils and Deposits of Oil and Gas-Bearing Regions of the USSR.) |
1971 |