Telephone-letter mail competition : a first look /

Bibliographic Details
Main Author:	McLaughlin, John F.
Format:	Book
Language:	English
Published:	Cambridge, Mass. : Harvard University, Program on Information Resources Policy, [1979]
Series:	Working paper (Harvard University. Program on Information Resources Policy) ; W-79-4.
Subjects:	Postal service > United States. Telephone > United States. Telecommunication.

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