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- 89043029 abstract "Discusses the history and different varieties of codes and ciphers, describing code machines, signals, sign language, picture languages, and hidden messages.".
- 89043029 contributor B5886359.
- 89043029 created "c1989.".
- 89043029 date "1989".
- 89043029 date "c1989.".
- 89043029 dateCopyrighted "c1989.".
- 89043029 description "Discusses the history and different varieties of codes and ciphers, describing code machines, signals, sign language, picture languages, and hidden messages.".
- 89043029 extent "80 p. :".
- 89043029 identifier "0894717812 :".
- 89043029 issued "1989".
- 89043029 issued "c1989.".
- 89043029 language "eng".
- 89043029 publisher "Philadelphia, Pa. : Running Press,".
- 89043029 subject "652/.8 20".
- 89043029 subject "Ciphers Juvenile literature.".
- 89043029 subject "Ciphers.".
- 89043029 subject "Cryptography Juvenile literature.".
- 89043029 subject "Cryptography.".
- 89043029 subject "Z103.3 .G7 1989".
- 89043029 title "The kids' book of secret codes, signals, and ciphers / E.A. Grant.".
- 89043029 type "text".