Columbia subject headings:
Civil engineering--Italy, Southern--History--Congresses.
Civil engineering--Italy--Naples (Kingdom)--Congresses.
Civil engineering--Italy--Naples (Province)--Congresses.
Harvard subject headings:
Architecture--Italy--Naples (Kingdom)--Congresses.
Civil engineering--Italy, Southern--History--Congresses.
Civil engineering--Italy--Naples (Kingdom)--History--Congresses.
Princeton subject headings: