Columbia subject headings:
Iron industry and trade--Turkey--Karabük İli.
Karabük İli (Turkey)--Economic conditions.
Karabük İli (Turkey)--History.
Karabük İli (Turkey)--Social conditions.
Karabük İli (Turkey)--Social life and customs.
Steel industry and trade--Turkey--Karabük İli.
Harvard subject headings:
Iron industry and trade--Turkey--Karabük İli.
Karabük İli (Turkey)--Economic conditions.
Karabük İli (Turkey)--History.
Karabük İli (Turkey)--Social conditions.
Karabük İli (Turkey)--Social life and customs.
Steel industry and trade--Turkey--Karabük İli.
Princeton subject headings: