Parcel post convention of Buenos Aires. September 15, 1921.
By: Together with the detailed regulations for its execution.
Contributors: United States. Post Office Dept.; Postal Union of the Americas and Spain.
Publisher: Govt. print. off.
Published: 1923
Place of publication: Washington
Language: eng
Number of pages: 11
Subjects: Postal conventions.
Notes: At head of title: Pan American postal union.
Spanish and English in parallel columns.
Seal of the Post-office department of the United States of America on t.-p.