All about codes
By: written by Gail Blasser Riley.
Series: Pair-it books.
Publisher: Steck-Vaughn Co.
Published: 2000
Place of publication: Austin, Tex
Language: eng
Number of pages: 40
Subjects: Cryptography -- Juvenile literature.; Ciphers -- Juvenile literature.
Genres: Juvenile literature.
Notes: Paired with Casey's code written by Gail Blasser Riley.
Includes index.