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. There are several small color splotches on the covers; otherwise, very nice. Near Fine. Wraps..... More