Title Secret writing; the craft of the cryptographer.

Publication Info.

New York : McGraw-Hill [1970]

Copies

Location	Call No.	Status
Plainville Public Library - Non Fiction	652.8 WOL	Check Shelf

Description	192 pages : illustrations ; 24 cm
Summary	Explains the distinction between ciphers and codes and describes their past and present use in secret communications.
Bibliography	Bibliography: pages [185]-188.
Subject	Cryptography -- Juvenile literature.
	Ciphers.
	Cryptography.

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