Columbia subject headings:
Harvard subject headings:
Azione cattolica italiana--History.
Azione cattolica italiana--Italy--Modena--History.
Azione cattolica italiana.
Catholic Church--Italy--Modena.
Catholic Church--Political activity--Italy--Modena--History--20th century.
Catholic Church. Pope (1878-1903 : Leo XIII). Rerum novarum.
Catholic action--Italy--Modena--History--20th century.
Church and social problems--Catholic Church
Church and social problems--Catholic Church--History--20th century
Church and social problems--Italy--Modena--History--20th century.
Cooperation--Italy--Modena--History--20th century.
Modena (Italy)--Church history.
Modena (Italy)--Politics and government.
Modena (Italy)--Social conditions.
Partito popolare italiano
Partito popolare italiano--History.
Partito popolare italiano--Italy--Modena--History.
Princeton subject headings:
Azione cattolica italiana--Italy--Modena--History.
Catholic Action--Italy--Modena--History--20th century.
Catholic Church--Italy--Modena--Political activity--History--20th century.
Catholic Church. Pope (1878-1903 : Leo XIII). Rerum novarum
Church and social problems--Catholic Church--History--20th century.
Church and social problems--Italy--Modena--History--20th century.
Modena (Italy)--Church history.
Modena (Italy)--Politics and government.
Partito popolare italiano--Italy--Modena--History.