| original |
Permian |
|
USSR(Kazakh SSR) |
Lyuber,A.A. et al. Atlas of microspores and pollen of the Paleozoic of the USSR. |
1941 |
| details |
Late Permian |
|
Mongolian Republic |
Bobrov,V.A. et al. On Upper Permian coal-bearing formations of Southern Mongolia. |
1957 |
| details |
Permian |
|
USSR(Urals) |
Kareva,E.A. The Upper Paleozoic and Lower Mesozoic of the Eastern Slope of the Urals and the western part of the Western Siberian Lowlands. (In: Geology and Petroleum Resources of the western parts of the Western Siberian Lowlands. S.G.Galerkina, editor) |
1959 |
| details |
Late Carboniferous |
|
Bulgaria |
Chernyavska,S. Palynological study of Coal from the Zalenigrad Mine, Belograd Region. |
1960 |
| details |
Permian |
|
USSR(Kazakh SSR) |
Hart,G.F. The systematics and distribution of Permian miospores. |
1965 |