Columbia subject headings:
City planning--Italy--Venice.
Cultural property--Protection--Italy--Venice.
Venice (Italy)--Threat of destruction.
Water levels--Italy--Venice, Lagoon of.
Harvard subject headings:
Venice (Italy)--Description and travel.
Water--Italy--Venice.
Princeton subject headings:
City planning--Italy--Venice--History.
Environmental policy--Italy--Venice--History.
Venice (Italy)--Threat of destruction--History.
Venice, Lagoon of (Italy)--History.