Columbia subject headings:
Labor movement--Slovenia--Maribor--History.
Working class--Slovenia--Maribor--History.
Harvard subject headings:
Princeton subject headings:
Communism--Slovenia--Maribor--History--Chronology.
Labor movement--Slovenia--Maribor--History--Chronology.
Labor unions--Slovenia--Maribor--History--Chronology.
Maribor (Slovenia)--History--Chronology.