Alexey Popov.Materials in the folk language collected in the Poshekhonsky district of the Yaroslavl province.

Alexey Popov.Materials in the folk language collected in the Poshekhonsky district of the Yaroslavl province.- -.-Agreement No. 24 of 02/12/2016 category 47 manuscript of the works of members of the Russian Geographical Society and individual documents in the Yaroslavl province, case 39..Electronic copy source: PB