Columbia subject headings:
Architecture--Italy--Bergamo--Guidebooks.
Architecture--Italy--Bergamo--History--20th century--Guidebooks.
Bergamo (Italy)--Buildings, structures, etc.--Guidebooks.
Harvard subject headings:
Architecture, Modern--Italy--Bergamo--Guidebooks.
Architecture--Italy--Bergamo--Guidebooks.
Bergamo (Italy)--Buildings, structures, etc.--Guidebooks.
Princeton subject headings: