| details |
Tertiary |
|
USSR(Ukrainian SSR) |
Chepikov,K.R. New data on microfossils in the crude oils of European USSR. |
1963 |
| details |
Cretaceous |
|
USSR(Kazakh SSR) |
Chepikov,K.R. New data on microfossils in the crude oils of European USSR. |
1963 |
| details |
Tertiary |
|
USSR(Moldavian SSR) |
Chepikov,K.R. New data on microfossils in the crude oils of European USSR. |
1963 |
| details |
Nd |
|
Nd |
Timofeev,B.V. Paleological investigation of petroleum. |
1965 |
| details |
Early Proterozoic |
|
USSR(Ukrainian SSR) |
Kalyaev,G.I. et al. New data on the stratigraphic position of the Krivorozhskoi series |
1973 |
| details |
Precambriam |
|
USSR |
Yankauskas,T.V. et al. Status of the study. (In: Precambrian Microfossils of the USSR. T.V.Yankauskas, editor) |
1989 |