Columbia subject headings:
Harvard subject headings:
Excavations (Archaeology)--Greece--Thrace, Western.
Greece--Civilization--To 146 B.C.
Iron--Metallurgy--History
Metallurgy in archaeology--Greece--Thrace, Western.
Steel--Metallurgy--History.
Thrace, Western (Greece)--Antiquities.
Princeton subject headings:
Excavations (Archaeology)--Greece--Thrace, Western.
Iron industry and trade--Greece--Thrace, Western--History.
Iron industry and trade--Social aspects--Greece--Thrace, Western.
Steel industry and trade--Greece--Thrace, Western--History.
Steel industry and trade--Social aspects--Greece--Thrace, Western.
Thrace, Western (Greece)--Antiquities.