Columbia subject headings:
Libraries--Denmark--Congresses.
Libraries--Space utilization--Congresses.
Library architecture--Congresses.
Library buildings--Congresses.
Library planning--Congresses.
Harvard subject headings:
Libraries--Denmark--Congresses.
Libraries--Space utilization--Congresses.
Library architecture--Congresses.
Library buildings--Congresses.
Library planning--Congresses.
Princeton subject headings:
Libraries--Space utilization--Congresses.
Library architecture--Congresses.
Library buildings--Congresses.
Library planning--Congresses.