Columbia subject headings:
Floors--Maintenance and repair--Congresses.
Mosaic floors--Italy--Venice--Congresses.
Terrazzo--Italy--Venice--Congresses.
Harvard subject headings:
Mosaic floors--Italy--Venice.
Pavements, Mosaic--Italy--Venice.
Terrazzo--Italy--Venice.
Princeton subject headings:
Mosaic floors--Italy--Venice--Congresses.
Pavements, Mosaic--Italy--Venice--Congresses.
Terrazzo--Italy--Venice--Congresses.