Southville International School and Colleges

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Winokur, Eric.

Secret codes / Eric Winokur. - New York : Trumpet Club, c1990. - 58 p. : ill. ; 19 cm. - Explorer books .





ISBN: 0440841542 9780440841548

LCCN: 2011489154

Subjects--Topical Terms:
Cryptography.
Ciphers.
Cryptography.
Ciphers.

LC Class. No.: Z 103.3 / .W776 1990

Dewey Class. No.: HS 794 / W73 1990