Post Office cost ascertainment system.
Subtitle: Hearings, Ninety-first Congress, first session. May 13, 22, June 11, 1969.
Publisher: U.S. Govt. Print. Off.
Published: 1969
Place of publication: Washington
Language: eng
Number of pages: 130
Subjects: Postal service -- United States -- Costs.
Notes: "Serial no. 91-5."