The kids' book of secret codes, signals, and ciphers /
Discusses the history and different varieties of codes and ciphers, describing code machines, signals, sign language, picture languages, and hidden messages.
Saved in:
| Main Author: | |
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| Format: | Book |
| Language: | English |
| Published: |
Philadelphia, Pa. :
Running Press,
c1989.
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| Subjects: |
Curriculum Collection Juvenile - Walker Library - 3rd Floor
| Call Number: |
652 GRA
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| Copy 1 | Available Pull and Hold |
