I. D. Lavrov.The tunes of two songs recorded in the village of Poretsky, Alatyrsky district.And the review of I. Nekrasov.

I. D. Lavrov.The tunes of two songs recorded in the village of Poretsky, Alatyrsky district.And the review of I. Nekrasov.- 1898. -Agreement No. 24 of 02/12/2016 category 37 manuscript of the works of members of the Russian Geographical Society and separate documents in the Simbirsk province, case 37..Electronic copy source: PB