The Cryptoclub Workbook: Using Mathematics to Make and Break Secret Codes
Beissinger, Janet, Pless, Vera
Sold by World of Books (was SecondSale), Montgomery, IL, U.S.A.
AbeBooks Seller since December 20, 2007
Used - Soft cover
Condition: Used - Very good
Ships within U.S.A.
Quantity: 1 available
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