| details |
Early Cambrian |
|
USSR(Latvian SSR) |
Birkis,A.P. et al. New data on the Cambrian stratigraphy of eastern Latvia |
1972 |
| details |
Early Cambrian |
|
USSR(Estonian SSR) |
Mens,K.A. et al. Distribution and correlation significance of organic remains in the Baltic Series of Estonia. (In: Stratigraphy of older Paleozoic deposits of the Baltic Regions. R.M. Miannil and K.A. Mens, editors) |
1984 |
| details |
Early Cambrian |
|
USSR(Baltic) |
Yankauskas,T.V. Lower and Middle Cambrian acritarch-Based biozonation of the North western part of the East European Platform |
1993 |