Columbia subject headings:
Ereğli (Zonguldak İli, Turkey)--Economic conditions.
Ereğli (Zonguldak İli, Turkey)--History.
Ereğli (Zonguldak İli, Turkey)--Social conditions.
Harvard subject headings:
Ereğli (Zonguldak İli, Turkey)--Economic conditions.
Ereğli (Zonguldak İli, Turkey)--History.
Ereğli (Zonguldak İli, Turkey)--Social conditions.
Princeton subject headings:
Ereğli (Zonguldak İli, Turkey)--Economic conditions.
Ereğli (Zonguldak İli, Turkey)--History.
Ereğli (Zonguldak İli, Turkey)--Social conditions.