Columbia subject headings:
Petroglyphs--Algeria--Tassili-n-Ajjer.
Petroglyphs--Sahara.
Sahara--Antiquities.
Tassili-n-Ajjer (Algeria)--Antiquities.
Harvard subject headings:
Petroglyphs--Algeria--Tassili-n-Ajjer.
Petroglyphs--Sahara.
Sahara--Antiquities.
Tassili-n-Ajjer (Algeria)--Antiquities.
Princeton subject headings:
Africa, North--Antiquities.
Petroglyphs--Africa, North.
Petroglyphs--Sahara.
Rock paintings--Africa, North.
Rock paintings--Sahara.
Sahara--Antiquities.