Columbia subject headings:
Harvard subject headings:
Agriculture--Algeria--Gourara (Oasis)
Agriculture--Algeria--Gourara.
Agriculture--Algeria--Twat.
Gourara (Algeria)--Antiquities.
Touat (Algeria)--Antiquities.
Princeton subject headings:
Agriculture--Algeria--Gourara (Oasis).
Agriculture--Algeria--Twat.
Gourara (Algeria)--Antiquities.
Touat (Algeria)--Antiquities.