Columbia subject headings:
Architecture--Italy--Milan--Guidebooks.
Architecture--Italy--Milan--History--19th century--Guidebooks.
Architecture--Italy--Milan--History--20th century--Guidebooks.
Buildings--Italy--Milan--Guidebooks.
Milan (Italy)--Buildings, structures, etc.--Guidebooks.
Milan (Italy)--Guidebooks.
Harvard subject headings:
Architecture, Modern--19th century--Italy--Milan--Guidebooks.
Architecture, Modern--20th century--Italy--Milan--Guidebooks.
Architecture--Italy--Milan--Guidebooks.
Milan (Italy)--Buildings, structures, etc.--Guidebooks.
Princeton subject headings: