Columbia subject headings:
Harvard subject headings:
Arts, Italian--Italy--Macerata (Province)--20th century--Congresses.
Macerata (Italy : Province)--History--20th century--Congresses.
Macerata (Italy : Province)--Social conditions--20th century--Congresses.
Princeton subject headings:
Macerata (Italy : Province)--Civilization--20th century--Congresses.
Macerata (Italy)--Civilization--20th century--Congresses.