Columbia subject headings:
Harvard subject headings:
Communication--Turkey--History.
Postal service--Turkey--History--17th century--Sources.
Postal service--Turkey--History--18th century--Sources.
Turkey--History--Ottoman Empire, 1288-1918.
Princeton subject headings:
Communication--Turkey--History.
Postal service--Turkey--History--17th century--Sources.
Postal service--Turkey--History--18th century--Sources.
Postal service--Turkey--History--Sources.
Turkey--History--Ottoman Empire, 1288-1918.