Columbia subject headings:
Excavations (Archaeology)--France--Aquitaine--Congresses.
Fortification--France--Aquitaine--History--Congresses.
Military architecture--France--Aquitaine--History--Congresses.
Harvard subject headings:
Excavations (Archaeology)--France--Aquitaine--Congresses.
Fortification--France--Aquitaine--History--Congresses.
Military architecture--France--Aquitaine--History--Congresses.
Princeton subject headings:
Excavations (Archaeology)--France--Aquitaine--Congresses.
Fortification--France--Aquitaine--History--Congresses.
Military architecture--France--Aquitaine--History--Congresses.