Columbia subject headings:
Architectural drawing--Italy--20th century.
Interior architecture--Italy--History--20th century.
Riva, Umberto, 1928-2021.
Harvard subject headings:
Architectural drawing--Italy--20th century.
Interior architecture--Italy--History--20th century.
Riva, Umberto, 1928-2021
Princeton subject headings:
Architectural drawing--Italy--20th century.
Interior architecture--Italy--History--20th century.
Riva, Umberto, 1928-2021.