Ivan Ustinov.Agricultural observations in the vicinity of the mountains.Belgorod.The author is a mentor of natural history and a...

Ivan Ustinov.Agricultural observations in the vicinity of the mountains.Belgorod.The author is a mentor of natural history and agriculture at the Kursk seminary.- -.-Agreement No. 24 of 02/12/2016 category 29 manuscript of the works of members of the Russian Geographical Society and separate documents in the Kursk province, case 23..Electronic copy source: PB