Cover image for Secret writing--codes and messages.
Secret writing--codes and messages.
Title:
Secret writing--codes and messages.
Personal Author EPSB:
Eugene H. Baker
Year Published:
1980
Series:
The Junior detective series.
Physical Description:
32 p. : col. ill. ; 22 cm.
Subject:
Ciphers

Cryptography
ISBN:
9780895651501
Publisher:
Child's World, c1980.
Edmonton Public Schools