Columbia subject headings:
Harvard subject headings:
Dacia--History.
Fortification--Romania--Porolissum.
Porolissum (Romania)--Antiquities, Roman.
Romania--Antiquities, Roman.
Romans--Romania--Porolissum.
Rome--Army.
Princeton subject headings:
Dacia--History.
Porolissum (Romania).
Romania--Antiquities, Roman.
Romans--Romania.