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Title |
Codes, ciphers, and secret writing. |
|
Imprint |
New York, N.Y. : Simon and Schuster, [1972] |
|
Description |
96 p. illus. 24 cm. |
Summary |
Explains in simple terms how to encode and decode messages in various ciphers, describes coding machines, and gives formulas for invisible ink. |
Bibliography |
Bibliography: p. 94-96. |
Subject |
Ciphers -- Juvenile literature.
|
|
Ciphers.
|
ISBN |
067165201X (lib. bdg.) |
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