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What Is the Name of This Book English 28.10.2011 Paperback / Softback Fr. 24.90 1-3 working days
Riddles in Mathematics English 20.08.2014 Paperback / Softback Fr. 19.90 1-3 weeks (not available at short notice)
Entertaining Mathematical Puzzles English 01.10.1986 Paperback / Softback Fr. 16.50 1-3 weeks (not available at short notice)