Columbia subject headings:
Frontier and pioneer life--Rome--Congresses.
Rome--Boundaries--Congresses.
Rome--Congresses.
Rome--History--Empire, 30 B.C.-284 A.D.--Congresses.
Harvard subject headings:
Frontier and pioneer life--Rome--Congresses.
Roman provinces--Congresses.
Rome--Boundaries--Congresses.
Rome--History--Empire, 30 B.C.-284 A.D.--Congresses.
Princeton subject headings:
Roman provinces--Congresses.
Rome--Boundaries--Congresses.