Codes for kids
By: Burton Albert, Jr. ; illustrated by Dev Appleyard.
Contributors: Appleyard, Dev.
Publisher: A. Whitman
Published: 1976
Place of publication: Chicago
Language: eng
Number of pages: 32
Subjects: Ciphers -- Juvenile literature.; Ciphers.
Description: Explains and illustrates twenty-nine codes which can be used to send secret messages or as brainteasers.
Notes: Includes index.