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- 69018241 abstract "Introduces ten encoding methods using numbers, rearranged letters, colored squares and dots, and other systems. Provides a message to decipher with each method.".
- 69018241 contributor B1936092.
- 69018241 contributor B1936093.
- 69018241 created "[1969]".
- 69018241 date "1969".
- 69018241 date "[1969]".
- 69018241 dateCopyrighted "[1969]".
- 69018241 description "Introduces ten encoding methods using numbers, rearranged letters, colored squares and dots, and other systems. Provides a message to decipher with each method.".
- 69018241 extent "32 p.".
- 69018241 issued "1969".
- 69018241 issued "[1969]".
- 69018241 language "eng".
- 69018241 publisher "[New York] Macmillan".
- 69018241 subject "652.8".
- 69018241 subject "Ciphers Juvenile literature.".
- 69018241 subject "Ciphers.".
- 69018241 subject "Z104 .R66".
- 69018241 title "Secrets with ciphers and codes, by Joel Rothman and Ruthven Tremain.".
- 69018241 type "text".