Columbia subject headings:
Excavations (Archaeology)--Antiquities.
Gao (Mali)--Antiquities.
Gao (Mali)--Commerce.
Harvard subject headings:
Excavations (Archaeology)--Antiquities.
Excavations (Archaeology)--Mali--Gao (Region)
Gao (Mali : Region)--Antiquities.
Gao (Mali : Region)--Commerce--History.
Gao (Mali)--Antiquities.
Gao (Mali)--Commerce.
Urbanization--Mali--Gao (Region)--History.
Princeton subject headings:
Excavations (Archaeology)--Antiquities.
Gao (Mali)--Antiquities.
Gao (Mali)--Commerce.