Technology of postal modernization.
Subtitle: Hearings, Ninetieth Congress, first [-second] session
Publisher: U.S. Govt. Print. Off.
Published: 1967
Place of publication: Washington
Language: eng
Subjects: Postal service -- Technological innovations -- United States
Notes: Hearings held May 23, 1967-Sept. 26, 1968

"Serial no. 90-17, 90-26, 90-50."
Table of contents: value: pt. 1. May 23 and 25, 1967.; value: pt. 2. November 21, 22, and 28, 1967.; value: pt. 3. September 25 and 26, 1968