Columbia subject headings:
Harvard subject headings:
Bergamo (Italy : Province)--Economic conditions--Sources.
Bergamo (Italy : Province)--Economic conditions.
Bergamo (Italy : Province)--History--Sources.
Bergamo (Italy : Province)--History.
Bergamo (Italy : Province)--Social conditions--Sources.
Bergamo (Italy : Province)--Social conditions.
Princeton subject headings:
Bergamo (Italy : Province)--Economic conditions--Sources.
Bergamo (Italy : Province)--Economic conditions.
Bergamo (Italy : Province)--History--Sources.
Bergamo (Italy : Province)--History.
Bergamo (Italy : Province)--Social conditions--Sources.
Bergamo (Italy : Province)--Social conditions.