Agreement for the exchange of insured letters and boxes ...
Subtitle: 30th November 1920.
Contributors: Great Britain. Post Office
Publisher: H.M.S.O.
Published: 1921
Place of publication: London
Language: eng
Number of pages: 18
Subjects: Postal service
Notes: (Cmd. 1538)

At head of title: Universal Postal Union.

French and English in parallel columns (English translation and Tables of Contents added in London)