Columbia subject headings:
Aragon (Spain)--Antiquities--Congresses.
Archaeology, Medieval--Spain--Aragon--Congresses.
Excavations (Archaeology)--Spain--Aragon--Congresses.
Harvard subject headings:
Aragon (Spain)--Antiquities--Congresses.
Archaeology, Medieval--Spain--Aragon--Congresses.
Excavations (Archaeology)--Spain--Aragon--Congresses.
Princeton subject headings:
Aragon (Spain)--Antiquities--Congresses.
Archaeology, Medieval--Spain--Aragon--Congresses.
Excavations (Archaeology)--Spain--Aragon--Congresses.