Cracking Codes /
Kimpton, Diana.
Cracking Codes / Diana Kimpton ; illustrated by Mike Phillips. - London : Hippo, 2003. - 158 p. : ill. ; 20 cm. - The knowledge .
Formerly CIP.
0439981840 (pbk.) : £4.99
GBA3V1837 bnb
006890392 Uk
Ciphers--Juvenile literature.
Cryptography--Juvenile literature.
Cracking Codes / Diana Kimpton ; illustrated by Mike Phillips. - London : Hippo, 2003. - 158 p. : ill. ; 20 cm. - The knowledge .
Formerly CIP.
0439981840 (pbk.) : £4.99
GBA3V1837 bnb
006890392 Uk
Ciphers--Juvenile literature.
Cryptography--Juvenile literature.