Columbia subject headings:
Harvard subject headings:
Collective farms--Russia (Federation)--Nizhegorodskai︠a︡ oblastʹ.
Labor--Russia (Federation)--Nizhegorodskai︠a︡ oblastʹ.
Social classes--Russia (Federation)--Nizhegorodskai︠a︡ oblastʹ.
Working class--Russia (Federation)--Nizhegorodskai︠a︡ oblastʹ.
Princeton subject headings:
Nizhniĭ Novgorod (Russia)--Economic history.
Nizhniĭ Novgorod (Russia)--History.