Columbia subject headings:
Aqueducts--Spain--Huelva.
Excavations (Archaeology)--Spain--Huelva.
Huelva (Spain)--Antiquities, Roman.
Water-supply--Spain--Huelva.
Harvard subject headings:
Aqueducts--Spain--Huelva.
Excavations (Archaeology)--Spain--Huelva.
Huelva (Spain)--Antiquities, Roman.
Water-supply--Spain--Huelva.
Princeton subject headings:
Aqueducts--Spain--Huelva.
Excavations (Archaeology)--Spain--Huelva.
Huelva (Spain)--Antiquities, Roman.
Water-supply--Spain--Huelva.