En
Ru| Title | The book of internal and external surveys of steam boiler No. 21 at the crystal factory A.D.Obolensky under the village of Nikolskaya Petrovka of the Gorodishchensky district of the Penza province |
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| Series | Documents of service and social activity A.D.and A.A.Obolensky.Correspondence and materials about the property of Obolensk |
| Fonds | Obolensky, princes |
| Display format |