Columbia subject headings:
Working class--Russia (Federation)--Nizhegorodskai︠a︡ oblastʹ.
Harvard subject headings:
Industries--Russia (Federation)--Nizhegorodskai︠a︡ oblastʹ.
Labor--Russia (Federation)--Nizhegorodskai︠a︡ oblastʹ.
Technological innovations--Russia (Federation)--Nizhegorodskai︠a︡ oblastʹ.
Work
Working class--Russia (Federation)--Nizhegorodskai︠a︡ oblastʹ.
Princeton subject headings:
Industries--Russia (Federation)--Gorʹkovskai︠a︡ oblastʹ.
Labor--Russia (Federation)--Gorʹkovskai︠a︡ oblastʹ.
Technological innovations--Russia (Federation)--Gorʹkovskai︠a︡ oblastʹ.
Work.