| details |
Sinian |
|
China(Szechwan) |
Wang,F. et al. The discovery of Baltisphaeridium in the Sinian from Huidong, Sichuan and its significance. |
1987 |
| details |
Precambriam |
|
USSR |
Yankauskas,T.V. et al. Fifth All-Union Colloquium on Precambrian microfossils of the USSR |
1987 |
| details |
Late Riphean |
Ordovician |
USSR(Bashkir ASSR) |
German,T.N. et al. Systematic descriptions of microfossils. (In: Precambrian Microfossils of the USSR. T.V.Yankauskas, editor) |
1989 |
| details |
Vendian |
|
USSR(Kazakh SSR) |
Grigaitis,R.K. et al. New Palaeontological data regarding Precambrian deposits of Yuzhnogo Alatau, Central Kazakhstan |
1989 |
| details |
Late Proterozoic |
|
Nd |
Fensome,R.A. et al. Acritarchs and Fossil Prasinophytes: An index to genera, species and infraspecific taxa. |
1990 |
| details |
Middle Proterozoic |
|
China(Hopei) |
Yan,Y.-Z. Shale-Facies microflora from the Changzhougou Formation (Changcheng System) in Pangjiabu Region, Hebei, China. |
1991 |
| details |
Late Riphean |
Vendian |
USSR(Uzbek SSR) |
Abduazimova,Z.M. et al. Problems of the Precambrian biostratigraphy of the West Uzbekistan |
1992 |