Ushakov Grigory.On the language of the inhabitants of the village of Vasyansky, Kashinsky u.Tver province.

Ushakov Grigory.On the language of the inhabitants of the village of Vasyansky, Kashinsky u.Tver province.- -.-Not later than 1849, Agreement No. 24 of 02/12/2016 category 41 manuscripts of the works of members of the Russian Geographical Society and separate documents in the Tver province, case 31..Electronic copy source: PB