| details |
Eifelian |
Frasnian |
USSR(Udmurt ASSR) |
Ostrovskii,M.I. et al. New information on the structure of the terrigenous Devonian of the central and southern regions of the Udmurtian ASR in connection with the direction of oil-prospecting opertions. |
1965 |
| details |
Eifelian |
Frasnian |
USSR(Yakut ASSR) |
Peterson,L.N. Characteristics of spore assemblages from Devonian deposits in South-Central Siberia. |
1975 |
| details |
Early Devonian |
Middle Devonian |
China(Kweichow) |
Kao,L. et al. Early and Middle Devonian spore assemblages from Tushan and Duyun of Kweichow and their stratigraphical significane. |
1975 |