| details |
Early Cambrian |
|
USSR(European) |
Sheneleva,E.D. On the stratigraphic range of some microfossils (acritarchs) in Vendian and Lower Cambrian deposits. (In: Preordovician deposits in the Central and Eastern Regions of the Russian Platform. Z.P.Ivanova and V.V.Kirsanov, editors) |
1969 |
| details |
Early Cambrian |
|
USSR(Russian Platform) |
Sakalauskas,V.F. et al. Cambrian System. (In: Stratigraphy and Paleogeography of the Sinian, Paleozoic and Triassic of the Western Russian Platform. E.M.Lutkevich and A.K.Krilova, editor) |
1973 |
| details |
Precambriam |
|
Africa |
Bozhko,N.A. et al. Upper Precambrian biostratigraphy of Africa. |
1975 |