Bentley's complete phrase code (nearly 1000 million combinations) with at least 2 letters difference between each half-code word) compiled by E.L. Bentley ...
|Main Author:||Bentley, E. L.|
New York, Rose Publishing Company [pref. 1909]
Cipher and telegraph codes.
"Reprint of first edition."
Stamped on t.-p.: New address: Technical book company, San Francisco.
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