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Spores and pollen of the coals of the USSR.
| Naumova, S.N. | |
| 1939 | |
| Report of the Seventeenth International Geological Congress, 1937, v.l, p.353-364. | |
| Spores and pollen of the coals of the USSR. |
Naumova, S.N., 1939: Spores and pollen of the coals of the USSR; Report of the Seventeenth International Geological Congress, 1937, v.l, p.353-364.