Columbia subject headings:
Harvard subject headings:
Architecture--Italy--Alps, Italian--20th century.
Architecture--Italy--Piedmont--History--20th century.
Architecture--Italy--Valle d'Aosta--History--20th century.
Hillside architecture--Italy--Alps, Italian--20th century.
Hillside architecture--Italy--Piedmont--History--20th century.
Hillside architecture--Italy--Valle d'Aosta--History--20th century.
Princeton subject headings:
Architecture--Italy--Piedmont--20th century.
Architecture--Italy--Valle d'Aosta--20th century.
Hillside architecture--Italy--Piedmont--History--20th century.
Hillside architecture--Italy--Valle d'Aosta--History--20th century.