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Break That Code - Thompson, Lisa, and Dalgleish, Sharon

Use your skills to break some codes and learn how codes have been used since ancient times. Find out how breaking secret enemy codes actually helped to win wars.

Break That Code 2004, Chelsea House Publications, PA

ISBN-13: 9780791084274

Hardcover

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Break That Code 2003, Blake Education, Glebe

ISBN-13: 9781865094731

Paperback

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