FullDatasets
Book 1984
Loads of codes and secret ciphers
4.01 4 readers shelved it
- Publisher
- Macmillan
- Language
- English
- Published
- 1984
- Ciphers -- Juvenile literature.
- Cryptography.
- Ciphers.
Discusses and provides practice in making and breaking codes and ciphers, as well as in building simple coding devices to transmit secret messages.