Savva Razumovsky.The city of Biryuch and its surroundings.The author is a priest of the mountains.Biryuch.

Savva Razumovsky.The city of Biryuch and its surroundings.The author is a priest of the mountains.Biryuch.- 1849. -Agreement No. 24 of 02/12/2016 category 9 manuscript of the works of members of the Russian Geographical Society and separate documents on the Voronezh province, case 32..Electronic copy source: PB