Dwight Smith, L. (1955). Cryptography: The science of secret writing. New York: Dover Publications.
Παραπομπή Chicago StyleDwight Smith, Laurence. Cryptography: The Science of Secret Writing. New York: Dover Publications, 1955.
Παραπομπή MLADwight Smith, Laurence. Cryptography: The Science of Secret Writing. New York: Dover Publications, 1955.
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