Columbia subject headings:
Cultural property--Protection--Italy--Venice--Congresses.
Environmental policy--Italy--Venice, Lagoon of--Congresses.
Pollution--Italy--Venice, Lagoon of--Congresses.
Venice, Lagoon of (Italy)--Environmental conditions--Congresses.
Harvard subject headings:
Cultural property--Protection--Italy--Venice--Congresses.
Environmental policy--Italy--Venice, Lagoon of--Congresses.
Pollution--Italy--Venice, Lagoon of--Congresses.
Venice, Lagoon of (Italy)--Environmental conditions--Congresses.
Princeton subject headings:
Cultural property--Protection--Italy--Venice--Congresses.
Environmental policy--Italy--Venice, Lagoon of--Congresses.
Pollution--Italy--Venice, Lagoon of--Congresses.
Venice, Lagoon of (Italy)--Environmental conditions--Congresses.