Columbia subject headings:
Architecture--History--Congresses.
Building--History--Congresses.
Civil engineering--History--Congresses.
Harvard subject headings:
Architecture--History--Congresses.
Building--History--Congresses.
Civil engineering--History--Congresses.
Princeton subject headings:
Architecture--History--Congresses.
Building--History--Congresses.
Civil engineering--History--Congresses.