Voprosy istorii politicheskogo, ėkonomicheskogo i sot︠s︡ialʹno-kulʹturnogo razvitii︠a︡ Chuvashskoĭ ASSR

V. A. Prokhorova, Nikolaĭ Egorovich Egorov, Chuvashskai︠a︡ A.S.S.R. (R.S.F.S.R.). Nauchno-issledovatelʹskiĭ institut i︠a︡zyka, literatury, istorii i ėkonomiki