Columbia subject headings:
Torcello (Italy)--History.
Venice (Italy)--History.
Harvard subject headings:
Torcello (Italy)--History.
Venice, Lagoon of (Italy)--History.
Water levels--Italy--Venice, Lagoon of--History.
Princeton subject headings:
Torcello (Italy)--History.
Venice, Lagoon of (Italy)--History.
Water levels--Italy--Venice, Lagoon of--History.