Pneumatic mail tube systems.
Subtitle: Hearings before the Committee on the Post Office and Post Roads, House of Representatives, Seventy-sixth Congress, first session, on H. R. 3811...
Publisher: U. S. Govt. print. off.
Published: 1939
Place of publication: Washington
Language: eng
Number of pages: 94
Subjects: Pneumatic-tube transportation; Postal service -- United States