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| Title | The letter of K. Gubastov P. D. Svyatopolk-Mirsky on the proclamation of the Bulgarian kingdom and the need to revise the decisions of the Berlin Congress |
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| Series | Case of permanent storage.1857-1914 |
| Fonds | Svyatopolk -Mirsky Peter Dmitrievich, Prince, Minister of the Interior (August 1904 - January 1905) |
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