Telephone-letter mail competition
Subtitle: a first look
By: John F. McLaughlin ... [et al.].
Series: Working paper -- W-79-4; Working paper (Harvard University. Program on Information Resources Policy) -- W-79-4.
Publisher: Harvard University, Program on Information Resources Policy
Published: 1979
Place of publication: Cambridge, MA
Language: eng
Number of pages: 117
Subjects: Postal service; Telephone; Telecommunication; Statistics; Postes; Téléphone