Military cryptanalysis
By: by William F. Friedman.
Series: Cryptographic series -- 40
Publisher: United States Govt. Print. Office
Published: 1938
Place of publication: Washington
Language: eng
Subjects: Cryptography.
Notes: At head of title: War Department.  Office of the chief signal officer, Washington.

Part 3. has 2. ed.

Includes index.
Table of contents: title: Part 1. Monoalphabetic substitution systems; title: Part 2. Simpler varieties of polyalphabetic substitution system; title: Part 3. Simpler varieties of aperiodic substitution systems.