Codes
By: written by Nigel Nelson ; illustrated by Tony De Saulles.
Contributors: De Saulles, Tony, ill.
Series: Nonverbal communication
Publisher: Thomson Learning
Published: 1994
Place of publication: New York
Language: eng
Number of pages: 32
Subjects: Ciphers -- Juvenile literature.; Ciphers.
Notes: Includes bibliographical references (p. 31) and index.
"A Wayland book"--P. [4] of cover.