Codes & ciphers
hundreds of unusual and secret ways to send messages
1st ed.
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Word Count
27,500 words, Guess
Page Count
110 pages
Identifiers
- ISBN-10155870292X
- ISBN-139781558702929
- Library of Congress Control Number92039008
- Open LibraryOL1734180M
Classifications
- DDC652/.8
- LCCZ103.3 .A83 1993
Alternate Titles
- Codes and ciphers.
Description
Provides the history behind codes and ciphers as used in spying and explains how readers themselves can make and use their own secret codes.
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