Pneumatic mail tube systems
Subtitle: Hearings before a subcommittee of the Committee on the Post Office and Post Roads, House of Representatives. H.R. 6, H.R. 4450, H.R. 7400. Tuesday, June 18, 1935
Publisher: Govt. Print. Off.
Published: 1935
Place of publication: Washington
Language: eng
Number of pages: 16
Subjects: Postal service
Other titles: Pneumatic-tube transportation