Messages in code
By: Janet Weller ; illustrated by Colin Mier.
Contributors: Mier, Colin, ill.
Edition: 1st American ed.
Series: Hello out there!
Publisher: F. Watts; Franklin Watts
Published: 1998
Place of publication: New York
Language: eng
Number of pages: 32
Subjects: Cryptography -- Juvenile literature.; Ciphers -- Juvenile literature.; Cryptography.; Ciphers.
Description: Describes various types of codes and ciphers, including the genetic code, and how useful they are to spies.
Notes: Includes index.