Columbia subject headings:
Fortification--Italy--Veneto--History--Guidebooks.
Venice (Italy)--Buildings, structures, etc.--Guidebooks.
Venice (Italy)--Defenses--History--Guidebooks.
Venice (Italy)--Guidebooks.
Harvard subject headings:
Princeton subject headings:
Fortification--Italy--Veneto--History--Guidebooks.
Guidebooks.
Venice (Italy)--Buildings, structures, etc.--Guidebooks.
Venice (Italy)--Defenses--History--Guidebooks.
Venice (Italy)--Guidebooks.