TY  - BOOK
AU  - Miller, Marvin
TI  - Codemaster Book 1 : : how to write and decode top-secret message 
SN  - 0-439-62717-6
U1  - 652.8 M649 1998 
PY  - 1998///
CY  - New York : 
PB  - Scholastic Inc., 
KW  - Ciphere -- Juvenile literature
KW  - Cryptography -- Juvenile literature
ER  -