En
Ru| Title | Letter Baron KKUngern-Sternberg P.A.Valuevo on the results of experience in the use of labor of prisoners for the construction of the Odessa-Balta-Kremenchug-Poltava-Kharkov railway |
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| Series | Archive of Count Petr Aleksandrovich Valuev |
| Fonds | Valuev Petr Alexandrovich, Earl (1814-1890). Minister of Internal Affairs, Minister of State Property, Chairman of the Committee of Ministers, member of the Council of State |
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