Columbia subject headings:
Asturias (Spain)--Antiquities--Congresses.
Excavations (Archaeology)--Spain--Asturias--Congresses.
Underwater archaeology--Congresses.
Underwater archaeology--Spain--Asturias--Congresses.
Harvard subject headings:
Asturias (Spain)--Antiquities--Congresses.
Excavations (Archaeology)--Spain--Asturias--Congresses.
Underwater archaeology--Congresses
Underwater archaeology--Spain--Asturias--Congresses.
Princeton subject headings: