Title The kids' book of secret codes, signals, and ciphers / E.A. Grant.

Publication Info.	Philadelphia, Pa. : Running Press, [1989]
	©1989

Copies

Location	Call No.	Status
Manchester, Main Library - Children's Department	J 652.8 GRANT	Check Shelf

Description	80 pages : illustrations ; 16 x 24 cm
Note	Cipher wheel inserted.
	Includes index.
Summary	Discusses the history and different varieties of codes and ciphers, describing code machines, signals, sign language, picture languages, and hidden messages.
Subject	Cryptography -- Juvenile literature.
	Ciphers -- Juvenile literature.
	Cryptography.
	Ciphers.
ISBN	0894717812: $5.95

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