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Codes, Ciphers and Secret Writing (Dover Children's Activity Books)

 
 
 
 
Codes, Ciphers and Secret Writing (Dover Children's Activity Books)
Author: Martin Gardner
ISBN 13: 9780486247618
ISBN 10: 486247619
Edition: unknown
Publisher: Dover Publications
Publication Date: 1984-10-01
Format: Paperback
Pages: 96
List Price: $5.95
 
 

Cipher and decipher codes: transposition and polyalphabetical ciphers, famous codes, typewriter and telephone codes, codes that use playing cards, knots, and swizzle sticks...even invisible writing and sending messages through space. 45 diagrams.