Columbia subject headings:
Africa--Antiquities.
Mesolithic period--Africa.
Paleolithic period--Africa.
Stone implements--Africa.
Harvard subject headings:
Africa--Antiquities.
Excavations (Archaeology)--Africa.
Paleolithic period--Africa.
Stone age--Africa.
Stone implements--Africa.
Princeton subject headings:
Africa--Antiquities.
Mesolithic period--Africa.
Paleolithic period--Africa.
Stone implements--Africa.