M. Sysoeva.Songs and ditties collected in the Yamburg district, Petrograd province.

M. Sysoeva.Songs and ditties collected in the Yamburg district, Petrograd province.- -.-Agreement No. 24 of 02/12/2016 category 35 manuscript of the works of members of the Russian Geographical Society and separate documents in the Petrograd province, case 32..Electronic copy source: PB