Columbia subject headings:
Architectural libraries--Europe--Congresses.
Architectural libraries--Italy--Congresses.
Library architecture--Europe--Congresses.
Library architecture--Italy--Congresses.
Harvard subject headings:
Architectural libraries--Europe--Congresses.
Architectural libraries--Italy--Congresses.
Library architecture--Europe--Congresses.
Library architecture--Italy--Congresses.
Princeton subject headings:
Architectural libraries--Europe--Congresses.
Architectural libraries--Italy--Congresses.
Library architecture--Europe--Congresses.
Library architecture--Italy--Congresses.