Columbia subject headings:
Cities and towns--Turkey--History--Congresses.
Military roads--Europe, Eastern--History--Congresses.
Military roads--Turkey--History--Congresses.
Roads--Turkey--History--Congresses.
Trade routes--Turkey--History--Congresses.
Harvard subject headings:
Cities and towns--Turkey--History--Congresses.
Military roads--Europe, Eastern--History--Congresses.
Military roads--Turkey--History--Congresses.
Roads--Turkey--History--Congresses.
Trade routes--Turkey--History--Congresses.
Princeton subject headings: