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![Eggs, knots and other mathematical mystifications: the last recreations I / Martin Gardner; [translation: Luis Bou García]](https://bibliotecnica.upc.edu/sites/default/files/carrusels/80_3_b12272668.jpg "Eggs, knots and other mathematical mystifications: the last recreations I / Martin Gardner; [translation: Luis Bou García]")
![Los Mágicos números del Doctor Matrix / Martin Gardner; [translation: Daniel Zadunaisky]](https://bibliotecnica.upc.edu/sites/default/files/carrusels/80_4_b11239104.jpg "Los Mágicos números del Doctor Matrix / Martin Gardner; [translation: Daniel Zadunaisky]")
