Columbia subject headings:
Labor movement--Russia (Federation)--Kostromskai︠a︡ oblastʹ--History--19th century--Chronology.
Labor movement--Russia (Federation)--Kostromskai︠a︡ oblastʹ--History--20th century--Chronology.
Working class--Political activity--Russia (Federation)--Kostromskai︠a︡ oblastʹ--History--19th century--Chronology.
Working class--Political activity--Russia (Federation)--Kostromskai︠a︡ oblastʹ--History--20th century--Chronology.
Harvard subject headings:
Labor movement--Russia (Federation)--Kostromskai︠a︡ oblastʹ--History--19th century--Chronology.
Labor movement--Russia (Federation)--Kostromskai︠a︡ oblastʹ--History--20th century--Chronology.
Working class--Russia (Federation)--Kostromskai︠a︡ oblastʹ--Political activity--History--19th century--Chronology.
Working class--Russia (Federation)--Kostromskai︠a︡ oblastʹ--Political activity--History--20th century--Chronology.
Princeton subject headings:
Labor movement--Russia (Federation)--Kostromskai︠a︡ oblastʹ--History--19th century--Chronology.
Labor movement--Russia (Federation)--Kostromskai︠a︡ oblastʹ--History--20th century--Chronology.
Working class--Russia (Federation)--Kostromskai︠a︡ oblastʹ--Political activity--History--19th century--Chronology.
Working class--Russia (Federation)--Kostromskai︠a︡ oblastʹ--Political activity--History--20th century--Chronology.