Columbia subject headings:
Catalonia (Spain)--Antiquities, Roman.
Quarries and quarrying--Spain--Catalonia--History.
Harvard subject headings:
Catalonia (Spain)--Antiquities, Roman.
Quarries and quarrying--Spain--Catalonia--History.
Princeton subject headings:
Catalonia (Spain)--Antiquities, Roman.
Quarries and quarrying--Spain--Catalonia--History.