Columbia subject headings:
Harvard subject headings:
Archaeology and history--Spain--Ebro River Valley.
Archaeology, Medieval--Spain--Ebro River Valley.
Social structure--Spain--Ebro River Valley (Spain)--History.
Spain--Civilization--Islamic influences.
Princeton subject headings:
Archaeology and history--Spain--Ebro River Valley.
Archaeology, Medieval--Spain--Ebro River Valley.
Social structure--Spain--Ebro River Valley (Spain)--History.
Spain--Civilization--Islamic influences.