Columbia subject headings:
Harvard subject headings:
Technical education--Russia (Federation)--Saint Petersburg.
Princeton subject headings:
Technical education--Russia (Federation)--Leningradskai︠a︡ oblastʹ--History.
Technical education--Russia (Federation)--Saint Petersburg--History.
Vocational education--Russia (Federation)--Leningradskai︠a︡ oblastʹ--History.
Vocational education--Russia (Federation)--Saint Petersburg--History.