Distribution of incoming lettermail at the Baltimore, Maryland city post office
By: Bernard M. Levin and Arthur E. Newman
Contributors: Newman, Arthur E., author; United States. National Bureau of Standards
Series: National Bureau of Standards technical note -- 33; NBS technical note -- 33.
Publisher: National Bureau of Standards, United States Department of Commerce, Office of Technical Services
Published: 1959
Place of publication: Washington, D.C
Language: eng
Number of pages: 114
Subjects: Mail sorting; Letter mail handling
Notes: Title from title screen (viewed Mar. 5, 2014).

"October 1959."

Includes bibliographical references (page 21).