Razvitie ėkonomiki i kulʹtury Chuvashskoĭ ASSRby Chuvashskai͡a A.S.S.R. (R.S.F.S.R.). Nauchno-issledovatelʹskiĭ institut i͡azyka, literatury, istorii i ėkonomikiDescription and travelEconomic conditionsCivilizationWriting a summary for young readers…For young readersBook data: Open Library