Columbia subject headings:
Communism--Italy--Emilia-Romagna--History.
Emilia-Romagna (Italy)--Economic conditions.
Emilia-Romagna (Italy)--Social conditions.
Partito comunista italiano--History.
Social conflict--Italy--Emilia-Romagna--History.
Working class--Political activity--Italy--Emilia-Romagna--History.
Harvard subject headings:
Communism--Italy--Emilia-Romagna--History.
Emilia-Romagna (Italy)--Economic conditions.
Emilia-Romagna (Italy)--Social conditions.
Partito comunista italiano--History.
Social conflict--Italy--Emilia-Romagna--History.
Working class--Italy--Emilia-Romagna--Political activity--History.
Princeton subject headings:
Communism--Italy--Emilia-Romagna--History.
Emilia-Romagna (Italy)--Economic conditions.
Emilia-Romagna (Italy)--Social conditions.
Partito comunista italiano--History.
Social conflict--Italy--Emilia-Romagna--History.
Working class--Italy--Emilia-Romagna--Political activity--History.