The Cryptoclub Workbook: Using Mathematics to Make and Break Secret Codes.
Beissinger, Janet & Vera Pless
Sold by Orrin Schwab Books, Providence, UT, U.S.A.
Heritage Bookseller
AbeBooks Seller since July 8, 1998
Used - Soft cover
Condition: Used - Very good
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Quantity: 1 available
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