Voprosy istoriografii istoriko-ėtnograficheskogo izuchenii︠a︡ Chuvashiiby Chuvashskai︠a︡ A.S.S.R. (R.S.F.S.R.). Nauchno-issledovatelʹskiĭ institut i︠a︡zyka, literatury, istorii i ėkonomikiHistoriographyEthnologyStudy and teachingWriting a summary for young readers…For young readersBook data: Open Library