Columbia subject headings:
Harvard subject headings:
Communism--Italy--Puglia--History--20th century.
Puglia (Italy)--Politics and government.
Working class--Italy--Puglia--Political activity--History--20th century.
Princeton subject headings:
Communism--Italy--Puglia--History--20th century.
Puglia (Italy)--Politics and government.
Social conflict--Italy--Puglia--History--20th century.
Working class--Italy--Puglia--Political activity--History--20th century.