Communication Theory of Secrecy Systems [Bell Monograph]
New York, NY: Bell Telephone Laboratories, Incorporated April 1950. First Separate Edition. 60 pages. 11 x 8 1/2 inches. Original printed grey, blue and black wrappers, stapled. Five holes punched at the spine as issued. A touch of wear to the extremities, a nice copy. Near Fine. Wraps.
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