Columbia subject headings:
Fortification--Italy--Friuli-Venezia Giulia.
Friuli Venezia Giulia (Italy)--Antiquities.
Julian March--Antiquities.
Harvard subject headings:
Fortification--Julian March.
Italy--Antiquities.
Julian March--Antiquities.
Yugoslavia--Antiquities.
Princeton subject headings:
Fortification--Italy--History.
Fortification--Yugoslavia--History.