Columbia subject headings:
Postal service--Palestine--History--19th century.
Postal service--Palestine--History--20th century.
Postal service--Turkey--History--19th century.
Postal service--Turkey--History--20th century.
Harvard subject headings:
Princeton subject headings:
Postal service--Palestine--History--19th century.
Postal service--Palestine--History--20th century.
Postal service--Turkey--History--19th century.
Postal service--Turkey--History--20th century.