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RuOryol Oblast
Oryol Oblast
The news about the whereabouts of graphites in the Orel province and the geognostic view on the soil of this province
Brykov, Ivan Ivanovich (1795-1870). The news about the whereabouts of graphites in Orel province and the geognostic view on the soil of this province. S. Petersburg: in the printing house of N. Grech, 1837.
1837
РГБ