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- 92039008 abstract "Provides the history behind codes and ciphers as used in spying and explains how readers themselves can make and use their own secret codes.".
- 92039008 alternative "Codes and ciphers.".
- 92039008 contributor B6656670.
- 92039008 created "c1993.".
- 92039008 date "1993".
- 92039008 date "c1993.".
- 92039008 dateCopyrighted "c1993.".
- 92039008 description "Includes bibliographical references (p. 105) and index.".
- 92039008 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.".
- 92039008 extent "110 p. :".
- 92039008 identifier "155870292X :".
- 92039008 issued "1993".
- 92039008 issued "c1993.".
- 92039008 language "eng".
- 92039008 publisher "Cincinnati, Ohio : Betterway Books,".
- 92039008 subject "652/.8 20".
- 92039008 subject "Ciphers Juvenile literature.".
- 92039008 subject "Ciphers.".
- 92039008 subject "Cryptography Juvenile literature.".
- 92039008 subject "Cryptography.".
- 92039008 subject "Z103.3 .A83 1993".
- 92039008 title "Codes & ciphers : hundreds of unusual and secret ways to send messages / Christina Ashton.".
- 92039008 type "text".