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How to tell a secret

How to tell a secret
Author(s): 
P. J Huff
J. G Lewin
Description: 
Tips, tricks & techniques for breaking codes & conveying covert information.
Call Number: 
327.12 Huf
Catalog URL: 
http://pac.griver.org/ipac20/ipac.jsp?uri=full%3D3100001~!584341~!0
New & Best List: 
Spy 101
Format: 
Book