Penrose Tiles To Trapdoor Ciphers By Martin Gardner. Vintage 1989 Fractal Mathematical Games. Retrurn Of Dr. Matrix. Math Book Gift...
Penrose Tiles To Trapdoor Ciphers
By Martin Gardner
1989 Vintage Softcover
Former library copy has a sticker on the side and has a square cut out of the front cover. otherwise in very nice shape.
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