| Citation | Frederichs, G., 1911. Bemerkung über einige oberpaläozoische Fossilien von Krasnoufimsk. Kazani Prot. Obsch. Jest., Beilage no. 269:1-8. |
| DOI / ISBN | |
| PDF/Reference URL | |
| Ref. No. | 134706 |
| Language | Russian |
| Usage | not used yet |
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