Columbia subject headings:
Conference materials.
Informational works.
Limes (Roman boundary)--Congresses.
Rome--Army--Congresses.
Rome--History, Military--30 B.C.-476 A.D.--Congresses.
Harvard subject headings:
Limes (Roman boundary)--Congresses.
Rome--Army--Congresses.
Rome--History, Military--30 B.C.-476 A.D.--Congresses.
Princeton subject headings:
Limes (Roman boundary)--Congresses.
Rome--Army--Congresses.
Rome--History, Military--30 B.C.-476 A.D.--Congresses.