Columbia subject headings:
Mari El (Russia)--Civilization--Bibliography.
Mariĭskiĭ nauchno-issledovatelʹskiĭ institut i︠a︡zyka, literatury i istorii im. V.M. Vasilʹeva--Bibliography.
Harvard subject headings:
Mari El (Russia)--Civilization--Bibliography.
Mariĭskiĭ naucho-issledovatelʹskiĭ institut i︠a︡zyka, literatury i istorii im. V.M. Vasilʹeva--Bibliography.
Princeton subject headings: