The Usborne book of secret codes / Eileen O'Brien, Diana Riddell
| Main Author: | O'Brien, Eileen |
|---|---|
| Other Authors: | Riddell, Diana |
| Format: | MONOGRAPHS |
| Language: | English |
| Published: |
New York : Scholastic, 1998 |
| Subjects: |
Ciphers.
Cryptography. |
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| Physical Description: |
32 p. : illus. ; 25 cm. |
|---|---|
| ISBN: |
0590631527 |