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The simple book of not-so-simple puzzles

Grabarchuk, Serhiy.

The simple book of not-so-simple puzzles [electronic resource] / Serhiy Grabarchuk, Peter Grabarchuk, Serhiy Grabarchuk, Jr. - Wellesley, Mass. : A.K. Peters, c2008. - vii, 105 p. : ill.

9781568815251 (ebook : PDF)


Puzzles.