Author: Marotta, Michael E.
Title: The Code Book : All About Unbreakable Codes and How to Use Them
Description: Port Townsend [WA], Loompanics Unlimited, 1979. orig. wrappers. 21x13cm, 74 pp.. Ills.. Minor rubbing. VG.

Keywords: Cryptography, Ciphers Cipher, Code Codes, , , , , ,