Mensa presents secret codes for kids
By: Robert Allen.
Contributors: Mensa.
Publisher: Carlton
Published: 1995
Place of publication: [London?]
Language: eng
Number of pages: 128
Subjects: Puzzles -- Juvenile literature.; Ciphers -- Juvenile literature.
Other titles: Secret codes for kids.
Notes: Erratum-slip pasted in.

Secret codes for kids.