Columbia subject headings:
Harvard subject headings:
Ebro River Valley (Spain)--Antiquities.
Excavations (Archaeology)--Spain--Ebro River Valley.
Trade routes--Spain--History.
Princeton subject headings:
Archaeology, Medieval--Spain--Ebro River Valley.
Archaeology, Medieval--Spain--La Rioja.
Ebro River Valley (Spain)--Antiquities.
Excavations (Archaeology)--Spain--Ebro River Valley.
Excavations (Archaeology)--Spain--La Rioja.
La Rioja (Spain)--Antiquities.