Columbia subject headings:
Architecture--Italy--Valle d'Aosta--20th century--Catalogs.
Harvard subject headings:
Architecture--Italy--Valle d'Aosta--20th century--Guidebooks.
Architecture--Italy--Valle d'Aosta--History--Catalogs.
Valle d'Aosta (Italy)--Buildings, structures, etc.--Guidebooks.
Princeton subject headings:
Architecture--Italy--Valle d'Aosta--20th century--Catalogs.
Catalogs.