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Author O'Brien, Eileen, 1970-

Title The Usborne book of secret codes / Eileen O'Brien and Diana Riddell ; edited by Fiona Watt and Cheryl Evans ; illustrated by Mark Watkinson.

Publication Info. Tulsa, OK : EDC Publishing, 1997.
Location Call No. Status
 Naper Blvd. Juvenile Nonfiction  J 652.8 OBR    AVAILABLE
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Description 32 pages : color illustrations ; 25 cm
Note First published: London : Usborne, 1997.
Contents Partial contents. Secret codes -- Letter swap code -- Calendar code -- Telephone code -- Morse code -- Code wheel -- Technobabble -- Newspaper code -- Number code -- Jumble code -- Dot code -- Invisible writing -- Code kit -- Code games.
Subject Cryptography -- Juvenile literature.
Ciphers -- Juvenile literature.
Added Author Riddell, Diana.
Watt, Fiona.
Evans, Cheryl.
Watkinson, Mark.
Added Title Secret codes
ISBN 0881109797 (lib. bdg.)
0746023294
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