Incorporation of the Vidzeme Post into the System of Communication of Russia and Renewal of its Activities after the Capitulation of Riga (1710–1721)
| Pārsla Pētersone | |
| History, , | |
| Issue | "Latvijas Arhīvi" 2000.4 |
| page 69 | |
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Incorporation of the Vidzeme Post into the System of Communication of Russia and Renewal of its Activities after the Capitulation of Riga (1710–1721)
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