Columbia subject headings:
Harvard subject headings:
Commerce, Prehistoric--Portugal.
Copper age--Portugal.
Excavations (Archaeology)--Portugal
Excavations (Archaeology)--Portugal.
Portugal--Antiquities.
Stone implements--Portugal.
Princeton subject headings:
Copper age--Portugal.
Industries, Prehistoric--Portugal.
Portugal--Antiquities.
Stone implements--Portugal.
Tools, Prehistoric--Portugal.