Columbia subject headings:
Architecture--Italy--Bologna.
Architecture.
De Angeli, Enrico, 1900-1979.
Harvard subject headings:
Architects--Italy.
Architecture--Italy--Bologna.
Architecture--Italy--History--20th century
De Angeli, Enrico, 1900-1979.
Princeton subject headings:
Architecture, Modern--20th century.
Architecture--Italy--Bologna.
De Angeli, Enrico, 1900-1979.