Secret writing--codes and messages /

Discusses a variety of codes and explains how to send and decode messages.

Bibliographic Details

Main Author:	Baker, Eugene H.
Other Authors:	Axeman, Lois
Format:	Book
Language:	English
Published:	Elgin, Ill. : Child's World ; [1980]
Series:	Junior detective series.
Subjects:	Cryptography > Juvenile literature. Ciphers > Juvenile literature. Cryptography. Ciphers.