| original |
Middle Cambrian |
|
USSR(European) |
Timofeev,B.V. On a new group of fossil spores. |
1957 |
| details |
Middle Cambrian |
|
USSR(Pre-Baltic) |
Timofeev,B.V. Ancient flora of the Prebaltic Region and its stratigraphic significance |
1959 |
| details |
Nd |
|
Nd |
Downie,C. et al. Bibliography and index of fossil dinoflagellates and acritarchs. |
1965 |
| details |
Middle Cambrian |
|
USSR(Lithuanian SSR) |
Korkutis,V.A. The lithostratigraphy of the Tyskre Suite, the "Obolus" Beds and the Letse Horizon in the South Baltic and their position in the Cambrian-Ordovician. (In: The Data of Geology of the Lithuana. A.Grigelis and V.Karatajute-Talatajute-Talimaa, editors) |
1966 |
| details |
Middle Cambrian |
|
Nd |
Fensome,R.A. et al. Acritarchs and Fossil Prasinophytes: An index to genera, species and infraspecific taxa. |
1990 |