Columbia subject headings:
Roads--Turkey--Trabzon İli--Design and construction--History.
Transportation--Turkey--Trabzon İli--History.
Harvard subject headings:
Roads--Turkey--Trabzon İli--Design and construction--History.
Transportation--Turkey--Trabzon İli--History.
Princeton subject headings:
Roads--Turkey--Trabzon İli--Design and construction--History.
Transportation--Turkey--Trabzon İli--History.