Columbia subject headings:
Harvard subject headings:
Krasnoi︠a︡rskiĭ kraĭ (Russia)--History--20th century.
Krasnoi︠a︡rskiĭ kraĭ (Russia)--Social conditions--History--20th century.
Princeton subject headings:
Krasnoi︠a︡rskiĭ kraĭ (Russia)--History--20th century.
Krasnoi︠a︡rskiĭ kraĭ (Russia)--Social conditions--History--20th century.