Columbia subject headings:
Harvard subject headings:
Aragon (Spain)--Antiquities, Roman.
Cadastres--Spain--Aragon--History.
Romans--Spain--Aragon.
Princeton subject headings:
Aragon (Spain)--Antiquities, Roman.
Cadastres--Spain--Aragon.
Centuriation (Surveying)--Spain--Aragon.
Land use--Spain--Aragon.
Romans--Spain--Aragon.