TY  - BOOK
AU  - Janesczko,Paul B.
AU  - LaReau,Jenna
TI  - Top secret: a handbook of codes, ciphers, and secret writing 
SN  - 0763629723
PY  - 2004///
CY  - Cambridge, Mass
PB  - Candlewick Press
KW  - Cryptography
KW  - Ciphers
ER  -